$4x^2-12x+1$
$9^2-16$
$\left(1-\left(\frac{1}{2}\sqrt{-1}\right)\right)^3$
$\left(1+2y^2\right)^3$
$4\tan\left(x\right)+5=2$
$\lim_{x\to0}\cos\left(\sin\left(x\right)\right)$
$\frac{dy}{dx}=\frac{2x-y+2}{4x-2y-1}$
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