$a\left|n+2\right|+\left|n+2\right|$
$n-\:15\:>\:40$
$\frac{x+3}{x\sqrt{x+3}}$
$-6x+7\le2+13x$
$\int x\left(xf^2+2\right)dx$
$\left(7x^2+7y^3\right)^3$
$5a^2-10a$
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