$\left(5r\:+\:7f\right)\:\left(7f\:-\:5r\right)\:$
$-56ab-14cd$
$2x;\:x=2$
$3\left(x\:+\:2\right)\:\ge\:2\left(x\:-\:4\right)$
$\int\left(\frac{x^2}{x}+\frac{\sqrt{x}}{x}-\frac{5}{x}\right)dx$
$\frac{1}{2\cos\left(x\right)}$
$\frac{dy}{dx}\left(2-y\right)$
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