\[
\boxed{
2\,{x}^{3}{\frac {{\rm d}^{2}}{{\rm d}{x}^{2}}}y \left( x \right) +{x}^{2} \left( 9+2\,xy \left( x \right)  \right) {\frac {\rm d}{{\rm d}x}}y \left( x \right) +b+xy \left( x \right)  \left( a+3\,xy \left( x \right) -2\,{x}^{2} \left( y \left( x \right)  \right) ^{2} \right) =0}
\]