\[ -3 y'(x)-2 y''(x)+y^{(3)}(x)+10 y(x)=0 \] ✓ Mathematica : cpu = 0.0047079 (sec), leaf count = 34
\[\left \{\left \{y(x)\to c_3 e^{-2 x}+c_2 e^{2 x} \cos (x)+c_1 e^{2 x} \sin (x)\right \}\right \}\] ✓ Maple : cpu = 0.006 (sec), leaf count = 27
\[ \left \{ y \left ( x \right ) ={{\rm e}^{-2\,x}}{\it \_C1}+{\it \_C2}\,{{\rm e}^{2\,x}}\sin \left ( x \right ) +{\it \_C3}\,{{\rm e}^{2\,x}}\cos \left ( x \right ) \right \} \]