$n-\:15\:>\:40$
$2+2m$
$\int6x^2e^{-3x}dx$
$\left(4xy4\right)^2$
$\sqrt{\frac{\left|x\right|-\left|x+2\right|}{5-\left|x-2\right|}}$
$4x^4-3x^3+26x^2-27x-90$
$5x^2-7x-90=0$
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