$x-9>4$
$r\left(r-1\right)\left(r-2\right)x^r$
$\int x\left(-x^2-1\right)^3dx$
$3\cdot\left(a+5\right)$
$\sin^24x+\sin4x^2$
$\left(3d-7e\right)\left(3d+7e\right)$
$\left|1-7-9\right|$
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