\[ \left (x^2+1\right ) x y'(x)+x^2 y(x)=0 \] ✓ Mathematica : cpu = 0.0201961 (sec), leaf count = 17
\[\left \{\left \{y(x)\to \frac {c_1}{\sqrt {x^2+1}}\right \}\right \}\] ✓ Maple : cpu = 0.006 (sec), leaf count = 13
\[\left \{y \left (x \right ) = \frac {c_{1}}{\sqrt {x^{2}+1}}\right \}\]