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