\[
\boxed{
{\frac {{\rm d}^{2}}{{\rm d}{x}^{2}}}y \left( x \right) =-1/2\,{\frac { \left( 3\,x+a+2\,b \right) {\frac {\rm d}{{\rm d}x}}y \left( x \right) }{ \left( x+a \right)  \left( x+b \right) }}-1/4\,{\frac { \left( a-b \right) y \left( x \right) }{ \left( x+a \right) ^{2} \left( x+b \right) }}=0}
\]