$16^{13}\:x\:14^7x\:81^{17}$

$\int_1^22cos\left(\pi x\right)dx$

$x^2+3x-6<9$

$15x+2x$

$\int_{2\pi\:\:}^{3\pi\:}\left(2\cos\left(x\right)+4\right)\left(2\cos\left(x\right)\right)dx$

$\frac{d}{dx}\left(\frac{-\cot\left(x\right)^5}{5}-\frac{\cot\left(x\right)^3}{3}\right)$

$\lim_{x\to0}\left(\frac{\sin\left(12x\right)}{3x}\right)$