$\log_{12}\left(x^3\right)$
$-7+1+n-7$
$\frac{dy}{dx}=\frac{4x+xy}{2y+xy}$
$\sec\left(x\right)^2=4\tan\left(x\right)-2$
$\left(-4\right)^2+4\left(-4\right)+5$
$\lim_{x\to0}\left(\frac{x-4}{x-\sqrt[2]{8-x}}\right)$
$-2xy^2+\:5x^2z\:x=1,\:y=-1\:z=2$
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