$\lim_{x\to-1}\left(30\right)$
$35\cdot18$
$9h^2-66h+121$
$1136-1272-\:-1250$
$y=x^{-8}+x^8$
$-93=-3\left(7-3x\right)$
$\int2sen\left(x\right)\cos\left(2x\right)dx$
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