\[
\boxed{
{\frac {\rm d}{{\rm d}x}}y \left( x \right) ={\frac {y \left( x \right)  \left( {x}^{3}+{x}^{2}y \left( x \right) + \left( y \left( x \right)  \right) ^{2} \right) }{{x}^{2} \left( x-1 \right)  \left( y \left( x \right) +x \right) }}=0}
\]