\[
\boxed{
 \left( {\it a2}\,x+{\it b2} \right) {\frac {{\rm d}^{2}}{{\rm d}{x}^{2}}}y \left( x \right) + \left( {\it a1}\,x+{\it b1} \right) {\frac {\rm d}{{\rm d}x}}y \left( x \right) + \left( {\it a0}\,x+{\it b0} \right) y \left( x \right) =0}
\]