$\int_0^3x^{-3}dx$
$5x-y+7-4x+13y+-1$
$\left(4a+\:2b\right)\left(4a+\:3c\right)$
$-118-15$
$\frac{2b^2}{b}$
$\frac{3}{5}-9\left(8.9\right)$
$12+7x=27+4x$
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