$4\pi\left(16\right)^2$

$0=\cos\left(x\right)^2-\sin\left(x\right)^2$

$1-4x+4^2$

$\frac{6x^2+6x-8}{x+2}$

$\left(9p^4+2q\right)^3$

$\lim_{x\to0}\left(\frac{x+1}{x-2}\right)^{\sqrt{x^2-4}}$

$\tan\left(a\right)\left(\cot\left(a\right)\cos\left(a\right)+\sin\left(a\right)\right)$