$\left(3x\right)\left(2x+6\right)$
$\left(44-x\right)^2$
$b-5>-4$
$3\left[m-\left(2-m\right)-3m\right]+6m$
$\frac{\left(4x+y\right)^2-\left(4x-y\right)^2}{16xy}$
$115-\left(-20\right)$
$\frac{1}{\cos\left(x\right)-1}-\frac{1}{\cos\:\left(x\right)+1}$
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