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