$2+4b\ge-7$
$xy'+y=\left(x+1\right)^2$
$-10\cdot\left(-7\right)$
$f\left(x\right)=\left(x^2-4\right)\left(x+1\right)$
$5x-9-9x^2-3x-5$
$p^2-21p+20$
$\frac{x^5-x^2+3x+2}{x-2}$
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