$\lim_{x\to8}\left(\frac{\left(9-x\right)}{x^2+81}\right)$

$\log\left(5\right)\sqrt{\frac{\left(x-1\right)^2}{\left(x-3\right)\left(x+2\right)^3}}$

$x^2\:+\:8x\:-\:20\:\le\:\:0$

$5csc\theta\:-3=2$

$\frac{d}{dx}\frac{xe^y+ye^x}{siny}=4x$

$\frac{\sin\left(x\right)+\tan\left(x\right)}{\sec\left(x\right)+1}\sin\left(x\right)$

$\left(1-8p\right)\left(2-8p\right)$