\[
\boxed{
{\it d4y} \left( x \right)  \left( \sin \left( x \right)  \right) ^{6}+4\, \left( {\frac {{\rm d}^{3}}{{\rm d}{x}^{3}}}y \left( x \right)  \right)  \left( \sin \left( x \right)  \right) ^{5}\cos \left( x \right) -6\, \left( {\frac {{\rm d}^{2}}{{\rm d}{x}^{2}}}y \left( x \right)  \right)  \left( \sin \left( x \right)  \right) ^{6}-4\, \left( {\frac {\rm d}{{\rm d}x}}y \left( x \right)  \right)  \left( \sin \left( x \right)  \right) ^{5}\cos \left( x \right) +y \left( x \right)  \left( \sin \left( x \right)  \right) ^{6}-f=0}
\]