$2xy^{-1}\left(-2y+6x^{-1}+5xy\right)$
$2y-72y-7$
$\left(x-\frac{1}{2}\right)^5$
$\lim_{x\to7}\left(v\right)$
$\left(-7a+8\right)+\left(9-4\right)$
$\frac{1+sec}{1+cos}$
$3b^210b-8$
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