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