$-1^{10}$
$2ux+2u-ux+u$
$\lim_{x\to-1\:}\left(x^2\right)\left(x^4\right)$
$14x+7$
$x+\frac{1}{x-3}=5$
$-\left(\frac{-30}{10}\right)$
$\left(-7\right).\left(+2\right).\left(-3\right).\left(-1\right)$
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