$\lim_{x\to-\infty}\left(\frac{3x^2}{2x-3}\right)$
$\left(6-x^2\right)\left(2-x\right)$
$\int[e^{2x-1}\cdot\sin\left(3-4x\right)]dx$
$\frac{c+8}{-6}=-12$
$-87-+132$
$2m^2+2m-2n^2$
$\frac{1}{sec\:t\:-1}+\frac{1}{sec\:t\:+1}=\:2cot\:t\:csc\:t$
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