$Ifu$ and $v$ are differentiable functions satisfying $u()=($:$0,5,3$:$),u^{\text{'}}()=($:$0,1,2$:$),$

$v()=($:$0,-1,5$:$),$ and $v^{\text{'}}()=($:$7,8,9$:$),$ evaluate $\frac{d}{dt}(uv){|}_t=.$

The value $of\frac{d}{dt}(uv){|}_t=isa$

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