Answer
$\dfrac{-4}{x^{1/4}}+C$
Work Step by Step
As we know $\int x^n dx=\dfrac{x^{n+1}}{n+1}+C$
Thus, $\int x^{-5/4}dx=(\dfrac{x^{-5/4+1}}{-5/4+1})+C=\dfrac{-4}{x^{1/4}}+C$
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