$2x+y;\:x=7;\:y=102$
$\frac{d}{dx}\left(\frac{\log\left(x\right)}{10+\log\left(x\right)}\right)$
$9-6x>2-5x$
$\left(2x-7^3\right)$
$\int sec\:bx\:dx$
$\lim_{x\to0}\frac{x^3-8x^2+7x}{x^2-x}$
$-357-501$
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