$\lim_{t\to0}\left(\frac{t^2}{1-\cos\left(t\right)}\right)$
$8x\left(x-3\right)$
$\frac{n}{-8}=-3$
$x\cdot\log\left(\sqrt{x+2}\right)$
$\left(5c^5a^6b^5\right)^2$
$\left(-2+2a\right)^2$
$9y^2-x^2y^2$
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