$\ln\left(2x\right)-\ln\left(2y\right)$
$\int x\cdot\left(1+x^2\right)^{-.5}dx$
$\frac{d^2}{dx^2}\left(x\:e^x\right)$
$\ln\frac{3}{x}\:=2$
$-\left(-120\:+\:-512\right)$
$a=\left(x+3\right)\left(x+2\right)-\left(x+7\right)\left(x-2\right)$
$\int\left(\frac{2e^{2x}}{4+e^{2x}}\right)dx$
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