$\sqrt{144}+2\cdot3^2$
$\int5\sqrt{3x-1}dx$
$\tan2=\cot\left(-480\right)$
$8xy-3y+7xy+4y$
$15n-22n$
$300-\left(70+\left(-4-20-10\right)\right)$
$\left(7p^2q+3s^4\right)\left(7p^2q-3s^4\right)$
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