work $2$

Question $16,14\mathrm{.}4\mathrm{.}35$

HW Score:

Points:

Find $\frac{\text{d}\text{e}\text{l}\text{w}}{\text{d}\text{e}\text{l}\text{r}}$ when $r=10$ and $s=-10$ if $w=(xyz{)}^2,x=r-s,y=cos(rs),z=sin(rs).$

$\frac{\text{d}\text{e}\text{l}\text{w}}{\text{d}\text{e}\text{l}\text{r}}{|}_r||=10,s=-10=$

$($Simplify your answer.$)$