$38x^2+19=\:19x\left(2x+1\right)$
$\frac{2x}{3}+\frac{x}{8}-\frac{4x}{12}$
$\frac{x^7+2x^3-4x+5}{x-2}$
$\left(y-x\right)dy-\left(y-x\right)dx$
$\lim_{x\to\pi}\left(\frac{cos\left(7\pi\right)}{x-\pi}\right)$
$=\:3x\:2\:\:\:\:+\:6xy2\:-\:18y\:3$
$2x-\sqrt{x+7}=7$
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