$\lim_{x\to3}\left(\frac{\left(x^2-9\right)}{\left|x-3\right|}\right)$
$2x+4y=13$
$1-b\left(1-b\right)$
$\int\left(2-\sqrt{x}\right)^2\:dx$
$\frac{13}{2}\cdot\frac{2}{1}$
$7^3-2^3$
$3m^3+4f+4+2f+2f^2+1$
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