$x^2+18x+6$
$-\frac{4}{2}$
$-4x+3\ge7$
$\int_{-1}^2\left(\frac{1}{x^2+1}\right)dx$
$x^2+6x-78$
$4y^2-28yz+49z^2$
$\left(x+6\right)\left(6x+1\right)$
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