$\lim_{y\to0}\left(\frac{\sin^2\left(3y\right)}{3y}\right)$
$\frac{dy}{dx}=\sin\left(12x-13\right)$
$3xyz+5xmz-8xz-xnzw$
$2x\left(x-2\right)$
$x^2\:+\:2x\:+1\:\ge\:0$
$\frac{2}{3}x>7$
$0.7+-1.2$
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