$3n^2-75$
$9\left(1+5r\right)+6\left(3-3r\right)$
$-4x\left(7-3x\right)=0$
$-3t+4=19$
$700x^2+210x+600$
$1+\left(-37\right)-\left(-16\right)$
$\int\left(\left(x+2\right)^{-3}\right)dx$
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