$-2\tan\left(x\right)^2-\tan\left(x\right)+1=0$

$s^{-8}\cdot s^4$

$\lim_{n\to\infty}\left(\left(1+\frac{1}{n}\right)^n\right)$

$0.14+0.11$

$\frac{y-1}{y\left(4-y^2\right)}dy=\frac{-2x}{x^2+2}dx$

$\left(-\:550\right)\:+\:\left(\:-\:25\right)$

$\frac{3x^{17}+34x^2-45}{x+1}$