$\left(15m+3\right)\left(15m-3\right)$
$\int\left(\frac{5x^2}{x-1}\right)dx$
$sen\:\frac{x}{3}\:cos\:\frac{x}{3}$
$\frac{dx}{dt}=t-\frac{1}{5}x$
$\left(x^2-1\right)\cdot\left(x-1\right)$
$-\frac{4}{7}n+\left(-\frac{2}{7}n\right)+\frac{1}{7}$
$( 1 - 2 x ) ^ { 3 }$
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