$\left(+50\right)+\left(-45\right)-\left(214\right)$

$\lim_{x\to0}\left(\left(\frac{x}{\left(\frac{1}{2}-\left(\frac{1}{2+x}\right)\right)}\right)\right)$

$x^2-6x+6=9$

$\int\:\frac{e^x+2}{e^x}dx$

$\frac{-120}{-20}$

$\frac{8x^3-43x^2-25x-30}{x-6}$

$\int\left(x+1\right)\left(\sqrt{x^2+2x+8}\right)dx$