\[ x^4+x \left (x^2 y(x)+x^2+y(x)^2\right ) y'(x)-2 x^2 y(x)^2-2 y(x)^3=0 \] ✓ Mathematica : cpu = 0.620665 (sec), leaf count = 102
\[\left \{\left \{y(x)\to -e^{-c_1} x^2-e^{-c_1} \sqrt {-e^{c_1} x^4+e^{2 c_1} x^2+x^4}\right \},\left \{y(x)\to e^{-c_1} \sqrt {-e^{c_1} x^4+e^{2 c_1} x^2+x^4}-e^{-c_1} x^2\right \}\right \}\]
✓ Maple : cpu = 0.73 (sec), leaf count = 165
\[ \left \{ y \left ( x \right ) =-{{x}^{3} \left ( x-2 \right ) \left ( {\frac {1}{{x}^{2} \left ( x-2 \right ) } \left ( {\it \_C1}\,x-{x}^{2}-\sqrt {-{\it \_C1}\,{x}^{4}+{{\it \_C1}}^{2}{x}^{2}+{x}^{4}} \right ) }-1 \right ) \left ( {\it \_C1}\,x-{x}^{2}-\sqrt {-{\it \_C1}\,{x}^{4}+{{\it \_C1}}^{2}{x}^{2}+{x}^{4}} \right ) ^{-1}},y \left ( x \right ) =-{{x}^{3} \left ( x-2 \right ) \left ( {\frac {1}{{x}^{2} \left ( x-2 \right ) } \left ( {\it \_C1}\,x-{x}^{2}+\sqrt {-{\it \_C1}\,{x}^{4}+{{\it \_C1}}^{2}{x}^{2}+{x}^{4}} \right ) }-1 \right ) \left ( {\it \_C1}\,x-{x}^{2}+\sqrt {-{\it \_C1}\,{x}^{4}+{{\it \_C1}}^{2}{x}^{2}+{x}^{4}} \right ) ^{-1}} \right \} \]