\[ y'(x)=\frac {x}{x^6+3 x^4 y(x)^2+x^4+3 x^2 y(x)^4+2 x^2 y(x)^2+y(x)^6+y(x)^4-y(x)+1} \] ✓ Mathematica : cpu = 0.161322 (sec), leaf count = 7
\[\left \{\left \{y(x)\to c_1\right \}\right \}\]
✓ Maple : cpu = 1.19 (sec), leaf count = 34
\[ \left \{ -y \left ( x \right ) +{\frac {\int ^{ \left ( y \left ( x \right ) \right ) ^{2}+{x}^{2}}\! \left ( {{\it \_a}}^{3}+{{\it \_a}}^{2}+1 \right ) ^{-1}{d{\it \_a}}}{2}}-{\it \_C1}=0 \right \} \]