$27m^{3}-125$

$\frac{1}{5}-\frac{x}{4}\:=\frac{7\left(x+3\right)}{10}$

$\lim_{x,y\to1,3}\left(\frac{\left(y-1\right)\cdot\left(x-3\right)^2}{\left(x-3\right)^2-\left(y-1\right)^2}\right)$

$3x^2+10x-5=0$

$-\sqrt{144}$

$\frac{d}{dx}arc\:cot\:2x^4$

$\int\sqrt[3]{1-4y}dy$