\[ a x^3+\left (x^2-1\right ) x y'(x)-\left (2 x^2-1\right ) y(x)=0 \] ✓ Mathematica : cpu = 0.0179409 (sec), leaf count = 24
\[\left \{\left \{y(x)\to a x+c_1 \sqrt {1-x^2} x\right \}\right \}\] ✓ Maple : cpu = 0.015 (sec), leaf count = 20
\[ \left \{ y \left ( x \right ) =x \left ( \sqrt {x-1}\sqrt {1+x}{\it \_C1}+a \right ) \right \} \]