\[ \left (x^2+1\right ) x y'(x)+x^2 y(x)=0 \] ✓ Mathematica : cpu = 0.0177874 (sec), leaf count = 17
DSolve[x^2*y[x] + x*(1 + x^2)*Derivative[1][y][x] == 0,y[x],x]
\[\left \{\left \{y(x)\to \frac {c_1}{\sqrt {x^2+1}}\right \}\right \}\] ✓ Maple : cpu = 0.005 (sec), leaf count = 13
dsolve(x*(x^2+1)*diff(y(x),x)+x^2*y(x) = 0,y(x))
\[y \left (x \right ) = \frac {c_{1}}{\sqrt {x^{2}+1}}\]