\[
\boxed{
{\frac {\rm d}{{\rm d}x}}y \left( x \right) ={\frac {1}{x} \left( 2\,y \left( x \right) +F \left( {\frac {y \left( x \right) }{{x}^{2}}} \right) {x}^{3} \right) }=0}
\]