$\lim_{x\to1}\left(1+\sin\left(x\right)\right)^{\frac{1}{x}}$

$4\ln\left(2\right)+\ln\left(x-3\right)=\ln\left(96\right)$

$\frac{\cos^2\theta-\text{sen}^2\theta}{\text{sen}\theta\cos\theta}$

$\frac{\sqrt[3]{2x^4y^4}}{9x}$

$2^2\left(5-3\right)$

$4n^2-28n+49$

$\frac{-2}{3}\left(\frac{10}{2}+-2+6\right)$