$9+3b-1+7b-2$
$x^5-21x^3+16x^2+108x-144$
$\sqrt{49b^{8}}$
$\frac{x^2-8}{x-2}$
$\frac{2x+1}{5}-\frac{1}{3}\left(2-x\right)>1$
$8\:\cdot\left(40+2\right)$
$1+4^2\cdot5$
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