$a+8^2$
$\cos\left(\cos^{-1}\left(0.5\right)\right)$
$\left(7x-4y\right)^3$
$\left(4\right)^3-2\left(4\right)^2+\left(4\right)-9$
$\frac{d}{dx}\frac{1}{5}\:at\:\frac{3}{4}$
$2\left(2x-y\right)+3y-x$
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