Answer
$F(x)$ is the antiderivative of $f(x)$.
Work Step by Step
We have
$$ -\frac{1}{4}((x+13)^{-4}+c)'=-\frac{-4}{4}(x+13)^{-4}=(x+13)^{-5}$$
that is, $\int(x+13)^{-5} d x= -\frac{1}{4}(x+13)^{-4}+C$.
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.