\[
\boxed{
{\frac {\rm d}{{\rm d}x}}y \left( x \right) ={\frac {y \left( x \right)  \left(  \left( y \left( x \right)  \right) ^{2}+xy \left( x \right) +{x}^{2}+x \right) }{{x}^{2}}}=0}
\]