\[
\boxed{
{\frac {{\rm d}^{2}}{{\rm d}{x}^{2}}}y \left( x \right) -{x}^{n-2}h \left( {\frac {y \left( x \right) }{{x}^{n}}},{\frac {{\frac {\rm d}{{\rm d}x}}y \left( x \right) }{{x}^{n-1}}} \right) =0}
\]