$-613-421-700$
$h ( t ) = \sqrt { t } ( 1 - t ^ { 2 } )$
$\cos\left(z-\pi\right)=-\cos\left(z\right)$
$6\:\left(5x\:+\:3\right)\:$
$\frac{3m^1-6m^{1-3}+45m^{1-4}}{3m^{1-4}}$
$2\left(r+3\right)+3\left(r+7\right)-10$
$3 x ^ { 5 } - 9 x ^ { 3 }$
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