$5b^3-20b^2+4b$
$3\left[2\left(2m-n\right)^2-2\left(2m-n\right)^2\right]$
$5\left(x+4\right)-3\left(x+10\right)$
$x^2-35x-75=0$
$5x+3>7x-3$
$-e^{-x}\left(\cos\left(x\right)+\sin\left(x\right)\right)^2$
$-\frac{1000}{10}$
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