\[
\boxed{
{\frac {{\rm d}^{2}}{{\rm d}{x}^{2}}}y \left( x \right) =-{\frac {b\cos \left( x \right) {\frac {\rm d}{{\rm d}x}}y \left( x \right) }{\sin \left( x \right) a}}-{\frac { \left( c \left( \cos \left( x \right)  \right) ^{2}+d\cos \left( x \right) +e \right) y \left( x \right) }{a \left( \sin \left( x \right)  \right) ^{2}}}=0}
\]