$4x^2+12xy+36y^2$
$123.000\:+12.670\:$
$\int x^2\left(5x+8\right)^6dx$
$v^2+20v=-7$
$\lim_{x\to-1}\left(\frac{x^3+4x^2+x+6}{x+1}\right)$
$40x^2+20x-12$
$\frac{-8a+12ab-4b^2}{b-a}$
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