Question
$\int_{}^{} {\frac{1}{{\sqrt x }}{{\tan }^4}\sqrt x } {\sec ^2}\sqrt x \;dx = $
$2\int_{}^{} {{t^4}dt} = \frac{2}{5}{(\tan \sqrt x )^5} + c = \frac{2}{5}{\tan ^5}\sqrt x + c$.
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