$\frac{7}{\frac{x}{x}}$
$4\:-\:3\:\left(x^2\:+\:x\:-\:2\right)$
$\frac{dx}{dt}=\left(x-2t\right)^2-7$
$\int\left(sin\left(\frac{3x}{2}\right)\cdot\:e^{\frac{x}{3}}\right)dx$
$2x+5<10x+3$
$\int\frac{e^{-t}}{e^t+e^{-t}}dt$
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