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