$8\cot\left(\arctan\left(2\right)\right)-6\cos^2\left(\arcsin\left(\frac{2}{3}\right)\right)$

$|0|$

$5\left(-8m\right)$

$\int_{\frac{-\pi}{5}}^{\frac{11\pi}{2}}tan^2\left(8x\right)dx$

$4x^2-28x+25$

$\int5\sin^{4}x\cos^{2}xdx$

$\int_{\frac{\pi}{4}}^{\frac{\pi}{2}}xsin\left(5x\right)dx$