\[ \left (x^2+1\right ) y'(x)-x \left (x^2+1\right )+x y(x)=0 \] ✓ Mathematica : cpu = 0.0242506 (sec), leaf count = 27
\[\left \{\left \{y(x)\to \frac {1}{3} \left (x^2+1\right )+\frac {c_1}{\sqrt {x^2+1}}\right \}\right \}\] ✓ Maple : cpu = 0.011 (sec), leaf count = 20
\[\left \{y \left (x \right ) = \frac {x^{2}}{3}+\frac {c_{1}}{\sqrt {x^{2}+1}}+\frac {1}{3}\right \}\]