$\tan^{-1}\sqrt{4}$

$x+x^{-1}=3$

$\frac{1}{5}\int x^2sin\left(-x\right)dx$

$\lim_{x\to0}\left(\frac{xcos\left(x\right)-sin\left(x\right)}{x}\right)$

$\int7\left(\tan\left(x\right)\right)\left(\ln\left(\cos\left(x\right)\right)\right)dx$

$\sqrt[5]{243}\cdot\sqrt[5]{32}$

$\lim_{x\to-\infty}\left(\frac{x^2+1}{x^2-1}\right)$