$16-32+8-4-5-6-9+1$

$\frac{1}{2}ln\:\frac{\left(1+x\right)}{1-x}$

$\left(2x^2\right)^2-2\left(2x^2\right)\left(3y^6\right)+\left(3y^6\right)^2$

$5x+45$

$\lim_{x\to-50}\left(\frac{\sqrt{-800x}-200}{x+50}\right)$

$3x^2-4\ge\:5$

$\lim_{x\to-4}\sqrt[3]{\frac{3-4x}{2-x}}$