$\int\left(\frac{2}{\left(x^3\right)\sqrt{\left(x^2-1\right)}}\right)dx$

$\int\left(\frac{\sqrt{1+x^2}}{-9x}\right)dx$

$2\cdot9-7$

$\frac{\left(x^3-2x^2-3x-4\right)}{x^2+1}$

$1\:=\:\frac{v}{4}$

$\lim_{x\to0}\left(\frac{\sin\left(x\right)-\tan\left(x\right)}{5x}\right)$

$\left(8u+2v^2\right)\left(8u-2v^2\right)$