\[
\boxed{
{x}^{2}{\frac {{\rm d}^{2}}{{\rm d}{x}^{2}}}y \left( x \right) + \left( a{x}^{{\it a1}}+b \right) x{\frac {\rm d}{{\rm d}x}}y \left( x \right) + \left( A{x}^{2\,{\it a1}}+B{x}^{{\it a1}}+C{x}^{{\it b1}}+{\it DD} \right) y \left( x \right) =0}
\]