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

$10\left(7.2\right)-144$

$\lim_{n\to5}\left(\frac{\ln\left(n+1\right)}{n}\right)$

$\frac{10}{2}+20+3$

$75x^3y^4-18x^3y^4$

$\int x^2\left(x^3+4\right)dx$

$3x-7\ge17$