\[ \left (x^2+1\right ) y''(x)-x y'(x)+y(x)=0 \] ✓ Mathematica : cpu = 0.0397497 (sec), leaf count = 29
\[\left \{\left \{y(x)\to -c_2 \sqrt {x^2+1}+c_1 x+c_2 x \sinh ^{-1}(x)\right \}\right \}\]
✓ Maple : cpu = 0.068 (sec), leaf count = 23
\[ \left \{ y \left ( x \right ) =-\sqrt {{x}^{2}+1}{\it \_C2}+x \left ( {\it \_C2}\,{\it Arcsinh} \left ( x \right ) +{\it \_C1} \right ) \right \} \]