4.10.16 Problems 1501 to 1600

Table 4.1047: System of differential equations

#

ODE

Mathematica

Maple

Sympy

21410

\[ {} [x^{\prime }\left (t \right ) = -x \left (t \right )-y \left (t \right ), y^{\prime }\left (t \right ) = 4 x \left (t \right )-y \left (t \right )] \]

21411

\[ {} [x^{\prime }\left (t \right ) = x \left (t \right )-y \left (t \right ), y^{\prime }\left (t \right ) = 3 x \left (t \right )-y \left (t \right )] \]

21412

\[ {} [x^{\prime }\left (t \right ) = -2 a x \left (t \right )-y \left (t \right ), y^{\prime }\left (t \right ) = \left (a^{2}+9\right ) x \left (t \right )] \]

21413

\[ {} [x^{\prime }\left (t \right ) = -x \left (t \right )+4 y \left (t \right ), y^{\prime }\left (t \right ) = 3 x \left (t \right )-5 y \left (t \right )] \]

21417

\[ {} [x_{1}^{\prime }\left (t \right ) = -2 x_{1} \left (t \right )+x_{2} \left (t \right )+x_{3} \left (t \right ), x_{2}^{\prime }\left (t \right ) = -2 x_{2} \left (t \right )+x_{3} \left (t \right ), x_{3}^{\prime }\left (t \right ) = x_{2} \left (t \right )-2 x_{3} \left (t \right )] \]

21418

\[ {} [x_{1}^{\prime }\left (t \right ) = a x_{1} \left (t \right )+5 x_{3} \left (t \right ), x_{2}^{\prime }\left (t \right ) = -x_{2} \left (t \right )-2 x_{3} \left (t \right ), x_{3}^{\prime }\left (t \right ) = -3 x_{3} \left (t \right )] \]

21419

\[ {} [x_{1}^{\prime }\left (t \right ) = x_{1} \left (t \right )+x_{2} \left (t \right )+x_{3} \left (t \right ), x_{2}^{\prime }\left (t \right ) = x_{1} \left (t \right )-2 x_{2} \left (t \right )-x_{3} \left (t \right ), x_{3}^{\prime }\left (t \right ) = x_{2} \left (t \right )-x_{3} \left (t \right )] \]

21420

\[ {} [x_{1}^{\prime }\left (t \right ) = a x_{1} \left (t \right ), x_{2}^{\prime }\left (t \right ) = a x_{2} \left (t \right )+x_{3} \left (t \right ), x_{3}^{\prime }\left (t \right ) = x_{2} \left (t \right )+a x_{3} \left (t \right )] \]

21421

\[ {} [x_{1}^{\prime }\left (t \right ) = x_{2} \left (t \right )+x_{4} \left (t \right ), x_{2}^{\prime }\left (t \right ) = -x_{2} \left (t \right )+x_{3} \left (t \right ), x_{3}^{\prime }\left (t \right ) = x_{2} \left (t \right )+x_{3} \left (t \right ), x_{4}^{\prime }\left (t \right ) = x_{1} \left (t \right )-x_{4} \left (t \right )] \]

21423

\[ {} [x_{1}^{\prime }\left (t \right ) = x_{2} \left (t \right ), x_{2}^{\prime }\left (t \right ) = x_{3} \left (t \right ), x_{3}^{\prime }\left (t \right ) = -a x_{3} \left (t \right )-b x_{2} \left (t \right )-c x_{1} \left (t \right )] \]

21431

\[ {} [x_{1}^{\prime }\left (t \right ) = -x_{1} \left (t \right ), x_{2}^{\prime }\left (t \right ) = -2 x_{2} \left (t \right ), x_{3}^{\prime }\left (t \right ) = x_{3} \left (t \right )] \]

21432

\[ {} [x^{\prime }\left (t \right ) = -x \left (t \right )+y \left (t \right )+y \left (t \right )^{2}, y^{\prime }\left (t \right ) = -2 y \left (t \right )-x \left (t \right )^{2}] \]

21433

\[ {} [x^{\prime }\left (t \right ) = -x \left (t \right )^{3}, y^{\prime }\left (t \right ) = -y \left (t \right )^{3}] \]

21708

\[ {} [2 x^{\prime }\left (t \right )-3 x \left (t \right )-2 y^{\prime }\left (t \right ) = t, 2 x^{\prime }\left (t \right )+3 x \left (t \right )+2 y^{\prime }\left (t \right )+8 y \left (t \right ) = 2] \]

21739

\[ {} [y^{\prime }\left (t \right ) = 2 y \left (t \right )-5 z \left (t \right ), z^{\prime }\left (t \right ) = 4 y \left (t \right )-2 z \left (t \right )] \]

21839

\[ {} [x^{\prime }\left (t \right )-6 x \left (t \right )+3 y \left (t \right ) = 8 \,{\mathrm e}^{t}, y^{\prime }\left (t \right )-2 x \left (t \right )-y \left (t \right ) = 4 \,{\mathrm e}^{t}] \]

21840

\[ {} [y^{\prime }\left (t \right )+z \left (t \right ) = t, z^{\prime }\left (t \right )+4 y \left (t \right ) = 0] \]

21841

\[ {} [w^{\prime }\left (t \right )+y \left (t \right ) = \sin \left (t \right ), y^{\prime }\left (t \right )-z \left (t \right ) = {\mathrm e}^{t}, w \left (t \right )+y \left (t \right )+z^{\prime }\left (t \right ) = 1] \]

21849

\[ {} \left [y^{\prime }\left (t \right ) = -\sqrt {1-y \left (t \right )^{2}}, x^{\prime }\left (t \right ) = x \left (t \right )+2 y \left (t \right )\right ] \]

21851

\[ {} [x^{\prime }\left (t \right ) = 8 x \left (t \right )-y \left (t \right ), y^{\prime }\left (t \right ) = 4 x \left (t \right )+12 y \left (t \right )] \]

21852

\[ {} [x^{\prime }\left (t \right ) = y \left (t \right ), y^{\prime }\left (t \right ) = -4 x \left (t \right )+4 y \left (t \right )] \]

21853

\[ {} [x^{\prime }\left (t \right ) = 2 x \left (t \right )-5 y \left (t \right ), y^{\prime }\left (t \right ) = 2 x \left (t \right )-4 y \left (t \right )] \]

21854

\[ {} [x^{\prime }\left (t \right ) = 2 x \left (t \right )+2 y \left (t \right )-z \left (t \right ), y^{\prime }\left (t \right ) = y \left (t \right )+z \left (t \right ), z^{\prime }\left (t \right ) = -y \left (t \right )+z \left (t \right )] \]

21855

\[ {} [x^{\prime }\left (t \right ) = x \left (t \right )+y \left (t \right ), y^{\prime }\left (t \right ) = 9 x \left (t \right )+y \left (t \right )] \]

21856

\[ {} [x^{\prime }\left (t \right ) = x \left (t \right )+2 y \left (t \right ), y^{\prime }\left (t \right ) = 4 x \left (t \right )+3 y \left (t \right )] \]

21857

\[ {} [x^{\prime }\left (t \right ) = 7 x \left (t \right )-y \left (t \right )+6 z \left (t \right ), y^{\prime }\left (t \right ) = -10 x \left (t \right )+4 y \left (t \right )-12 z \left (t \right ), z^{\prime }\left (t \right ) = -2 x \left (t \right )+y \left (t \right )-z \left (t \right )] \]

21858

\[ {} [x \left (t \right )+y^{\prime }\left (t \right ) = \sin \left (t \right )+\cos \left (t \right ), x^{\prime }\left (t \right )+y \left (t \right ) = \cos \left (t \right )-\sin \left (t \right )] \]

21859

\[ {} [x^{\prime }\left (t \right ) = y \left (t \right ), y^{\prime }\left (t \right ) = -2 x \left (t \right )+3 y \left (t \right )] \]

21860

\[ {} [x^{\prime }\left (t \right ) = 3 x \left (t \right )+2 y \left (t \right ), y^{\prime }\left (t \right ) = -5 x \left (t \right )+y \left (t \right )] \]

21861

\[ {} [x^{\prime }\left (t \right ) = 4 x \left (t \right )-y \left (t \right ), y^{\prime }\left (t \right ) = x \left (t \right )+2 y \left (t \right )] \]

21862

\[ {} [x^{\prime }\left (t \right ) = 6 x \left (t \right )-3 y \left (t \right ), y^{\prime }\left (t \right ) = 2 x \left (t \right )+y \left (t \right )] \]

21863

\[ {} [2 x^{\prime }\left (t \right )-3 y^{\prime }\left (t \right ) = 2 \,{\mathrm e}^{2 t}, x^{\prime }\left (t \right )-2 y^{\prime }\left (t \right ) = 0] \]

21864

\[ {} [y^{\prime }\left (t \right ) = y \left (t \right )-3 z \left (t \right ), z^{\prime }\left (t \right ) = 2 y \left (t \right )-4 z \left (t \right )] \]

21865

\[ {} [x^{\prime }\left (t \right ) = 4 x \left (t \right )-y \left (t \right ), y^{\prime }\left (t \right ) = -4 x \left (t \right )+4 y \left (t \right )] \]

21866

\[ {} [x^{\prime }\left (t \right ) = 7 x \left (t \right )-y \left (t \right )+6 z \left (t \right ), y^{\prime }\left (t \right ) = -10 x \left (t \right )+4 y \left (t \right )-12 z \left (t \right ), z^{\prime }\left (t \right ) = -2 x \left (t \right )+y \left (t \right )-z \left (t \right )] \]

21867

\[ {} [x^{\prime }\left (t \right ) = 3 x \left (t \right )+y \left (t \right )-z \left (t \right ), y^{\prime }\left (t \right ) = x \left (t \right )+3 y \left (t \right )-z \left (t \right ), z^{\prime }\left (t \right ) = 3 x \left (t \right )+3 y \left (t \right )-z \left (t \right )] \]

21868

\[ {} [x^{\prime }\left (t \right ) = x \left (t \right )-y \left (t \right )-z \left (t \right ), y^{\prime }\left (t \right ) = y \left (t \right )+3 z \left (t \right ), z^{\prime }\left (t \right ) = 3 y \left (t \right )+z \left (t \right )] \]

21869

\[ {} [x^{\prime }\left (t \right ) = y \left (t \right )+{\mathrm e}^{t}, y^{\prime }\left (t \right ) = -2 x \left (t \right )+3 y \left (t \right )+1] \]

21870

\[ {} [x^{\prime }\left (t \right ) = 2 x \left (t \right )-y \left (t \right )-5 t, y^{\prime }\left (t \right ) = 3 x \left (t \right )+6 y \left (t \right )-4] \]

21871

\[ {} [x^{\prime }\left (t \right ) = 2 x \left (t \right )+y \left (t \right )+3 \,{\mathrm e}^{2 t}, y^{\prime }\left (t \right ) = -4 x \left (t \right )+2 y \left (t \right )+t \,{\mathrm e}^{2 t}] \]

21893

\[ {} [x^{\prime }\left (t \right ) = 2 x \left (t \right )-7 y \left (t \right ), y^{\prime }\left (t \right ) = 3 x \left (t \right )-8 y \left (t \right )] \]

21894

\[ {} [x^{\prime }\left (t \right ) = 2 x \left (t \right )+4 y \left (t \right ), y^{\prime }\left (t \right ) = -2 x \left (t \right )+6 y \left (t \right )] \]

21895

\[ {} [x^{\prime }\left (t \right ) = x \left (t \right )+4 y \left (t \right )-y \left (t \right )^{2}, y^{\prime }\left (t \right ) = 6 x \left (t \right )-y \left (t \right )+2 x \left (t \right ) y \left (t \right )] \]

21896

\[ {} [x^{\prime }\left (t \right ) = \sin \left (x \left (t \right )\right )-4 y \left (t \right ), y^{\prime }\left (t \right ) = \sin \left (2 x \left (t \right )\right )-5 y \left (t \right )] \]

21897

\[ {} [x^{\prime }\left (t \right ) = 8 x \left (t \right )-y \left (t \right )^{2}, y^{\prime }\left (t \right ) = 6 x \left (t \right )^{2}-6 y \left (t \right )] \]

21898

\[ {} [x^{\prime }\left (t \right ) = -x \left (t \right )^{2}-y \left (t \right ), y^{\prime }\left (t \right ) = x \left (t \right )] \]

21899

\[ {} [x^{\prime }\left (t \right ) = -x \left (t \right )^{3}-y \left (t \right ), y^{\prime }\left (t \right ) = x \left (t \right )] \]

21900

\[ {} [x^{\prime }\left (t \right ) = 2 x \left (t \right ) y \left (t \right ), y^{\prime }\left (t \right ) = 3 y \left (t \right )^{2}-x \left (t \right )^{2}] \]

21901

\[ {} [x^{\prime }\left (t \right ) = x \left (t \right )^{2}, y^{\prime }\left (t \right ) = 2 y \left (t \right )^{2}-x \left (t \right ) y \left (t \right )] \]

21902

\[ {} [x^{\prime }\left (t \right ) = -x \left (t \right )+y \left (t \right )^{2}, y^{\prime }\left (t \right ) = x \left (t \right )^{2}-y \left (t \right )] \]

22009

\[ {} [x^{\prime }\left (t \right )+x \left (t \right )+y^{\prime }\left (t \right )+y \left (t \right ) = 0, x^{\prime }\left (t \right )-y^{\prime }\left (t \right )-y \left (t \right ) = t] \]

22010

\[ {} [y^{\prime }\left (t \right )-3 z \left (t \right ) = 5, y \left (t \right )-z^{\prime }\left (t \right )-x \left (t \right ) = 3-2 t, z \left (t \right )+x^{\prime }\left (t \right ) = -1] \]

22011

\[ {} [x^{\prime \prime }\left (t \right )-x \left (t \right )+y \left (t \right ) = {\mathrm e}^{t}, x^{\prime }\left (t \right )+x \left (t \right )-y^{\prime }\left (t \right )-y \left (t \right ) = 3 \,{\mathrm e}^{t}] \]

22012

\[ {} [x^{\prime }\left (t \right )-2 x \left (t \right )+y^{\prime }\left (t \right )-2 y \left (t \right ) = 1, y^{\prime }\left (t \right )+z^{\prime }\left (t \right )+z \left (t \right ) = 2, 3 x \left (t \right )+z^{\prime }\left (t \right )+z \left (t \right ) = 3] \]

22013

\[ {} [x^{\prime }\left (t \right )+3 x \left (t \right )-y \left (t \right ) = 0, y^{\prime }\left (t \right )+y \left (t \right )-3 x \left (t \right ) = 0] \]

22014

\[ {} [x^{\prime }\left (t \right )-x \left (t \right )-2 y \left (t \right ) = 0, y^{\prime }\left (t \right )-2 y \left (t \right )-3 x \left (t \right ) = 0] \]

22015

\[ {} [y^{\prime }\left (t \right )+y \left (t \right )-x^{\prime \prime }\left (t \right )+x \left (t \right ) = {\mathrm e}^{t}, y^{\prime }\left (t \right )-x^{\prime }\left (t \right )+x \left (t \right ) = {\mathrm e}^{-t}] \]

22040

\[ {} [x^{\prime }\left (t \right )+y^{\prime }\left (t \right )-y \left (t \right ) = 0, y^{\prime }\left (t \right )+2 y \left (t \right )+z^{\prime }\left (t \right )+2 z \left (t \right ) = 2, x \left (t \right )+z^{\prime }\left (t \right )-z \left (t \right ) = 0] \]

22041

\[ {} [x^{\prime \prime }\left (t \right ) = 1, x^{\prime }\left (t \right )+x \left (t \right )+y^{\prime \prime }\left (t \right )-9 y \left (t \right )+z^{\prime }\left (t \right )+z \left (t \right ) = 0, 5 x \left (t \right )+z^{\prime \prime }\left (t \right )-4 z \left (t \right ) = 2] \]

22056

\[ {} [y^{\prime }\left (t \right )-3 z \left (t \right ) = 5, y \left (t \right )-z^{\prime }\left (t \right )-x \left (t \right ) = 3-2 t, z \left (t \right )+x^{\prime }\left (t \right ) = -1] \]

22060

\[ {} [y^{\prime }\left (t \right )+y \left (t \right )-x^{\prime }\left (t \right )+x \left (t \right ) = t, x^{\prime }\left (t \right )+y^{\prime }\left (t \right )+x \left (t \right )-y \left (t \right ) = 0] \]

22371

\[ {} [y^{\prime }\left (t \right )+z \left (t \right ) = t, z^{\prime }\left (t \right )+4 y \left (t \right ) = 0] \]

22372

\[ {} [w^{\prime }\left (t \right )+y \left (t \right ) = \sin \left (t \right ), y^{\prime }\left (t \right )-z \left (t \right ) = {\mathrm e}^{t}, w \left (t \right )+y \left (t \right )+z^{\prime }\left (t \right ) = 1] \]

22373

\[ {} [y^{\prime \prime }\left (t \right )+z \left (t \right )+y \left (t \right ) = 0, y^{\prime }\left (t \right )+z^{\prime }\left (t \right ) = 0] \]

22374

\[ {} [z^{\prime \prime }\left (t \right )+y^{\prime }\left (t \right ) = \cos \left (t \right ), y^{\prime \prime }\left (t \right )-z \left (t \right ) = \sin \left (t \right )] \]

22375

\[ {} [w^{\prime \prime }\left (t \right )-y \left (t \right )+2 z \left (t \right ) = 3 \,{\mathrm e}^{-t}, -2 w^{\prime }\left (t \right )+2 y^{\prime }\left (t \right )+z \left (t \right ) = 0, 2 w^{\prime }\left (t \right )-2 y \left (t \right )+z^{\prime }\left (t \right )+2 z^{\prime \prime }\left (t \right ) = 0] \]

22376

\[ {} [y^{\prime }\left (t \right )+z \left (t \right ) = t, z^{\prime }\left (t \right )-y \left (t \right ) = 0] \]

22377

\[ {} [y^{\prime }\left (t \right )-z \left (t \right ) = 0, y \left (t \right )-z^{\prime }\left (t \right ) = 0] \]

22378

\[ {} [w^{\prime }\left (t \right )-w \left (t \right )-2 y \left (t \right ) = 1, y^{\prime }\left (t \right )-4 w \left (t \right )-3 y \left (t \right ) = -1] \]

22379

\[ {} [w^{\prime }\left (t \right )-y \left (t \right ) = 0, w \left (t \right )+y^{\prime }\left (t \right )+z \left (t \right ) = 1, w \left (t \right )-y \left (t \right )+z^{\prime }\left (t \right ) = 2 \sin \left (t \right )] \]

22380

\[ {} [u^{\prime \prime }\left (t \right )-2 v \left (t \right ) = 2, u \left (t \right )+v^{\prime }\left (t \right ) = 5 \,{\mathrm e}^{2 t}+1] \]

22381

\[ {} [w^{\prime \prime }\left (t \right )-2 z \left (t \right ) = 0, w^{\prime }\left (t \right )+y^{\prime }\left (t \right )-z \left (t \right ) = 2 t, w^{\prime }\left (t \right )-2 y \left (t \right )+z^{\prime \prime }\left (t \right ) = 0] \]

22382

\[ {} [w^{\prime \prime }\left (t \right )+y \left (t \right )+z \left (t \right ) = -1, w \left (t \right )+y^{\prime \prime }\left (t \right )-z \left (t \right ) = 0, -w \left (t \right )-y^{\prime }\left (t \right )+z^{\prime \prime }\left (t \right ) = 0] \]

22383

\[ {} [x^{\prime }\left (t \right ) = y \left (t \right ), y^{\prime }\left (t \right ) = 8 x \left (t \right )-2 y \left (t \right )] \]

22384

\[ {} [x^{\prime }\left (t \right ) = y \left (t \right ), y^{\prime }\left (t \right ) = 8 x \left (t \right )-2 y \left (t \right )+{\mathrm e}^{t}] \]

22385

\[ {} [x^{\prime }\left (t \right ) = y \left (t \right ), y^{\prime }\left (t \right ) = -x \left (t \right )+3] \]

22386

\[ {} [x^{\prime }\left (t \right ) = y \left (t \right ), y^{\prime }\left (t \right ) = -9 x \left (t \right )+6 y \left (t \right )+t] \]

22387

\[ {} [x^{\prime }\left (t \right ) = y \left (t \right ), y^{\prime }\left (t \right ) = -2 y \left (t \right )-5 z \left (t \right )+3, z^{\prime }\left (t \right ) = y \left (t \right )+2 z \left (t \right )] \]

22388

\[ {} [x^{\prime }\left (t \right ) = x \left (t \right )+y \left (t \right ), y^{\prime }\left (t \right ) = 9 x \left (t \right )+y \left (t \right )] \]

22389

\[ {} [x_{1}^{\prime }\left (t \right ) = x_{2} \left (t \right ), x_{2}^{\prime }\left (t \right ) = 6 x_{1} \left (t \right )] \]

22390

\[ {} [x_{1}^{\prime }\left (t \right ) = x_{2} \left (t \right ), x_{2}^{\prime }\left (t \right ) = 6 x_{1} \left (t \right )+4] \]

22391

\[ {} [x_{1}^{\prime }\left (t \right ) = x_{2} \left (t \right ), x_{2}^{\prime }\left (t \right ) = 6 x_{1} \left (t \right )+4] \]

22392

\[ {} [x_{1}^{\prime }\left (t \right ) = x_{2} \left (t \right ), x_{2}^{\prime }\left (t \right ) = 6 x_{1} \left (t \right )+4] \]

22393

\[ {} [x_{1}^{\prime }\left (t \right ) = x_{2} \left (t \right ), x_{2}^{\prime }\left (t \right ) = 6 x_{1} \left (t \right )+9 \,{\mathrm e}^{-t}] \]

22394

\[ {} [x^{\prime }\left (t \right ) = x \left (t \right )+2 y \left (t \right ), y^{\prime }\left (t \right ) = 4 x \left (t \right )+3 y \left (t \right )] \]

22395

\[ {} [x_{1}^{\prime }\left (t \right ) = x_{2} \left (t \right ), x_{2}^{\prime }\left (t \right ) = x_{3} \left (t \right ), x_{3}^{\prime }\left (t \right ) = 6 t] \]

22998

\[ {} [y^{\prime }\left (t \right ) = x \left (t \right ), x^{\prime }\left (t \right ) = -y \left (t \right )] \]

22999

\[ {} [u^{\prime }\left (x \right ) = 2 v \left (x \right )-1, v^{\prime }\left (x \right ) = 1+2 u \left (x \right )] \]

23000

\[ {} [x^{\prime }\left (t \right ) = x \left (t \right )+y \left (t \right ), y^{\prime }\left (t \right ) = x \left (t \right )-y \left (t \right )] \]

23001

\[ {} [y^{\prime \prime }\left (t \right ) = x \left (t \right ), y^{\prime \prime }\left (t \right ) = y \left (t \right )] \]

23002

\[ {} [y^{\prime \prime }\left (t \right ) = x \left (t \right )-2, y^{\prime \prime }\left (t \right ) = y \left (t \right )+2] \]

23003

\[ {} [y^{\prime }\left (t \right )+6 y \left (t \right ) = x^{\prime }\left (t \right ), 3 x \left (t \right )-x^{\prime }\left (t \right ) = 2 y^{\prime }\left (t \right )] \]

23004

\[ {} [x^{\prime }\left (t \right )+x \left (t \right )+2 y \left (t \right ) = 1, 2 x \left (t \right )+y^{\prime }\left (t \right )-2 y \left (t \right ) = t] \]

23005

\[ {} [x^{\prime }\left (t \right )+y^{\prime }\left (t \right )+2 x \left (t \right )-y \left (t \right ) = -\sin \left (t \right ), x^{\prime }\left (t \right )-3 x \left (t \right )+y^{\prime }\left (t \right )+2 y \left (t \right ) = 4 \cos \left (t \right )] \]

23006

\[ {} [x^{\prime \prime }\left (t \right )+2 y^{\prime }\left (t \right )+8 x \left (t \right ) = 32 t, y^{\prime \prime }\left (t \right )+3 x^{\prime }\left (t \right )-2 y \left (t \right ) = 60 \,{\mathrm e}^{-t}] \]

23007

\[ {} \left [x^{\prime }\left (t \right )-2 y^{\prime }\left (t \right ) = {\mathrm e}^{t}, x^{\prime }\left (t \right )+y^{\prime }\left (t \right ) = \sqrt {t}\right ] \]

23008

\[ {} [x^{\prime }\left (t \right )+3 y^{\prime }\left (t \right ) = x \left (t \right ) y \left (t \right ), 3 x^{\prime }\left (t \right )-y^{\prime }\left (t \right ) = \sin \left (t \right )] \]

23009

\[ {} [r^{\prime \prime }\left (t \right ) = r \left (t \right )+y \left (t \right ), y^{\prime \prime }\left (t \right ) = 5 r \left (t \right )-3 y \left (t \right )+t^{2}] \]

23010

\[ {} [x \left (t \right ) y^{\prime }\left (t \right )+y \left (t \right ) x^{\prime }\left (t \right ) = t^{2}, 2 x^{\prime \prime }\left (t \right )-y^{\prime }\left (t \right ) = 5 t] \]

23011

\[ {} [x^{\prime \prime }\left (t \right )+y^{\prime }\left (t \right )+x \left (t \right ) = y \left (t \right )+\sin \left (t \right ), y^{\prime \prime }\left (t \right )+x^{\prime }\left (t \right )-y \left (t \right ) = 2 t^{2}-x \left (t \right )] \]