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