$\lim_{x\to8}\left(\frac{\sqrt{x+4}-\sqrt{12}}{x-8}\right)$
$\left[\left(-\:25\right)\::\:5\:+\:\left(8\:-\:4\::\:2\right)\right]\:$
$\int\frac{1}{\sqrt{9x^2+1}}dx$
$z^2+3\sqrt{73z}+73$
$\frac{1}{\csc\:\left(y\right)}y'\:=-\frac{1}{\sec\:^2\left(x\right)}$
$x+3y+2z=2$
$s^{-1}$
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