\[ y'(x)=\frac {8 a^3 x^3+12 a^2 x^4+48 a^2 x^2 y(x)+6 a x^5+48 a x^3 y(x)-16 a x^2+96 a x y(x)^2+x^6+12 x^4 y(x)-8 x^3+48 x^2 y(x)^2-32 x y(x)+64 y(x)^3-32 x}{32 a x+16 x^2+64 y(x)+64} \] ✓ Mathematica : cpu = 1.50167 (sec), leaf count = 1
\[\{\}\]
✓ Maple : cpu = 0.08 (sec), leaf count = 41
\[ \left \{ y \left ( x \right ) =-{\frac {{x}^{2}}{4}}-{\frac {ax}{2}}+{\it RootOf} \left ( -x+\int ^{{\it \_Z}}\!2\,{\frac {{\it \_a}+1}{2\,{{\it \_a}}^{3}+{\it \_a}\,a+a}}{d{\it \_a}}+{\it \_C1} \right ) \right \} \]