$\left(2xy+4\right)\left(2xy+7\right)$
$+-8=-3$
$\lim\:_{x\to\:1}\left(\frac{x^2-4x+3}{x^2-1}\right)$
$\int x\:5^{x^2+2}dx$
$8r+12p-7-3p$
$\int18xe^{-9}dx$
$15x\cdot15x$
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