$\int\left(2x-16\right)\left(x^2-16x+20\right)^4dx$

$\int\left(4x\sec\:^2\left(x\right)\cos\:\left(x\right)\right)dx$

$\int_{4\sqrt{9x-x^2}}^4dx$

$\lim_{x\to0}\left(\frac{\cos\left(x\right)-1}{2x^3\csc\left(x\right)}\right)$

$-3\left(x-2y\right)$

$4x^4-9$

$x^3+8x^2+x+8$