$890-523-35$
$\left(-5\right)-\left(+13\right)+\left(-16\right)-\left(-8\right)+\left(+7\right)$
$3x=729$
$\int\frac{1}{\left(x-a\right)}dx$
$5+\left(-7\right)-10\left(-8\right)$
$7b^2\left(3+9b\right)$
$3m+9+2m-\frac{2}{3}$
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