\[ y'(x)=-x^6+3 x^4 y(x)+x^4-3 x^2 y(x)^2-2 x^2 y(x)+y(x)^3+y(x)^2+2 x+1 \] ✓ Mathematica : cpu = 0.0665084 (sec), leaf count = 79
\[\text {Solve}\left [-\frac {29}{3} \text {RootSum}\left [-29 \text {$\#$1}^3+3 \sqrt [3]{29} \text {$\#$1}-29\& ,\frac {\log \left (\frac {-3 x^2+3 y(x)+1}{\sqrt [3]{29}}-\text {$\#$1}\right )}{\sqrt [3]{29}-29 \text {$\#$1}^2}\& \right ]=c_1+\frac {1}{9} 29^{2/3} x,y(x)\right ]\] ✓ Maple : cpu = 0.076 (sec), leaf count = 28
\[ \left \{ y \left ( x \right ) ={x}^{2}+{\it RootOf} \left ( -x+\int ^{{\it \_Z}}\! \left ( {{\it \_a}}^{3}+{{\it \_a}}^{2}+1 \right ) ^{-1}{d{\it \_a}}+{\it \_C1} \right ) \right \} \]