Find dydx\displaystyle \frac{{{\left.{d}{y}\right.}}}{{{\left.{d}{x}\right.}}} for y=sin(4x)8x4\displaystyle {y}=\frac{{{\sin{{\left({4}{x}\right)}}}}}{{\sqrt{{{8}-{x}^{{{4}}}}}}}.

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