\[
\boxed{
{\it d4y} \left( x \right) + \left( a{x}^{2}+b\lambda+c \right) {\frac {{\rm d}^{2}}{{\rm d}{x}^{2}}}y \left( x \right) + \left( a{x}^{2}+\beta\,\lambda+\gamma \right) y \left( x \right) =0}
\]