$\int cos^5t\:dt$

$-104-\left(62\right)$

$12+36+15x-3-6x\left(-9\right)$

$\frac{z^{-5}r^2}{r^3z^2}$

$\int_1^{\infty}\left(\frac{4}{x\sqrt{2x^2-1}}\right)dx$

$\frac{1}{tanx}+\tan\left(x\right)=\frac{1}{sinxcosx}$

$\lim_{x\to infinity}\left(\frac{\left(x-i\right)}{i\cdot x-1}\right)$