$2\left(x-y\right)-3\left(x-y\right)$
$3x-3^2-4x\:-3+5$
$\frac{2ab}{3a\:}$
$\int_0^1\left(\frac{1}{4x-7}\right)dx$
$y^2e^t+\left(e^t+4\right)\frac{dy}{dt}=0$
$\left|\left(-16\right)+\left(-12\right)\right|$
$\left(\frac{y}{2}+\frac{1}{7}\right)\left(\frac{y}{2}-\frac{1}{7}\right)$
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