\[ a x^3+\left (x^2-1\right ) x y'(x)-\left (2 x^2-1\right ) y(x)=0 \] ✓ Mathematica : cpu = 0.020876 (sec), leaf count = 24
\[\left \{\left \{y(x)\to a x+c_1 \sqrt {1-x^2} x\right \}\right \}\]
✓ Maple : cpu = 0.024 (sec), leaf count = 21
\[ \left \{ y \left ( x \right ) =\sqrt {1+x}\sqrt {x-1}x{\it \_C1}+ax \right \} \]