$\int\left(3r^2\sqrt{1+r^3}\right)dr$
$4\left(2a+2b\right)$
$\ln\left(7\right)+5\ln\left(x\right)$
$4x-2\cdot\left(3x-1\right)$
$\left(x^2-\frac{2}{3}\right)\left(x^2-\frac{1}{2}\right)$
$-x-6=0$
$2x^2-13x-20=0$
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