$2cos\left(x+\pi\right)$
$6x+9<-3x$
$e\left(x\right)\left(1-x^2\right)$
$\log_{49}\left(49\right)$
$\left(2x+2\right)\left(x-1\right)$
$4u^3v-40u^2v^2+100uv^3$
$\int\left(\sqrt{x}+\frac{8}{\sqrt{x}}\right)^2dx$
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