Find dydx\displaystyle \frac{{{\left.{d}{y}\right.}}}{{{\left.{d}{x}\right.}}} for y=sin(x)x4\displaystyle {y}=\frac{{{\sin{{\left({x}\right)}}}}}{{{x}^{{{4}}}}}.

dydx\displaystyle \frac{{{\left.{d}{y}\right.}}}{{{\left.{d}{x}\right.}}} =