$\int\left(\frac{sin\:x}{2cos\:x\:-\:4}\right)dx$

$\sec\left(x\right)-\frac{\cos\left(x\right)}{\sin\left(x\right)+1}=\tan\left(x\right)$

$\int x\left(9x^2+4\right)^8dx$

$\int\left(\frac{-x-20}{x^2-5x-14}\right)dx$

$\int\left(\csc\left(x\right)\cot\left(x\right)\right)dx$

$\left(4p-s\right)\left(4p+s\right)$

$\sin\left(30\right)\cdot\tan\left(30\right)+\cos\left(30\right)$