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

$\left(-781\right)-\left(+643\right)-\left(-103\right)$

$\int_1^{\infty}\frac{4}{\sqrt[4]{x}}dx$

$\int\left(\frac{4}{x}-1\right)^2dx$

$\frac{d}{dx}2^y$

$16m^2-8m=1$

$\left(-\frac{2}{3}-y\right)\left(-\frac{2}{3}+y\right)$