Answer
$$ g'(t) =2(2-t)e^{4t-t^2}.$$
Work Step by Step
Recall that $(e^x)'=e^x$
Since $ g(t)=e^{4t-t^2}$, then the derivative, using the chain rule, is given by
$$ g'(t)=e^{4t-t^2}(4t-t^2)'=(4-2t)e^{4t-t^2}=2(2-t)e^{4t-t^2}.$$
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