\[ -x^4+x^2 y'(x)^2+\left (1-x^2\right ) y(x)^2-2 x y(x) y'(x)=0 \] ✓ Mathematica : cpu = 0.0642821 (sec), leaf count = 26
\[\{\{y(x)\to -x \sinh (x-c_1)\},\{y(x)\to x \sinh (x+c_1)\}\}\] ✓ Maple : cpu = 3.914 (sec), leaf count = 61
\[y \relax (x ) = -i x\]