$a^2-8a-16$
$cos\left(cos^{-1}\left(180\right)\right)$
$2\sin\left(0.5\right)$
$x^2\:-7x+12>0$
$\frac{dy}{dx}=\frac{xe^{4x+y^5}}{y^4}$
$\lim_{x\to0}\left(\frac{3x\left(cos\left(7x\right)\right)-1}{\left(sin\left(2x\right)\right)-2x}\right)$
$\lim_{x\to o}\sqrt[x]{1-2x}$
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