\[
\boxed{
{\frac {{\rm d}^{2}}{{\rm d}{x}^{2}}}y \left( x \right) =-{\frac { \left( A{x}^{2}+Bx+C \right) {\frac {\rm d}{{\rm d}x}}y \left( x \right) }{ \left( x-a \right)  \left( x-b \right)  \left( x-c \right) }}-{\frac { \left( {\it DD}\,x+E \right) y \left( x \right) }{ \left( x-a \right)  \left( x-b \right)  \left( x-c \right) }}=0}
\]