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