$\int\frac{3x}{\sqrt{x^2+4}}dx$
$18-\left(-20\right)$
$y'+3y=e^t$
$\log_{25}\left(x\right)=.5$
$3r\:\ge\:27$
$-22\cdot\left(-10\right)$
$\left(2a-5b\right)\left(4a^2+10ab+25b^2\right)$
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