$-\left(-4-\left(-2\right)+\left(2\right)\right)+5$
$\frac{2}{8}+\frac{3}{4}$
$3846+374$
$\frac{2}{3}x-\frac{1}{4}\le\frac{x}{6}-\frac{5}{12}$
$\left(sinx\right)\left(cosx\:-sinx\right)$
$\frac{\text{sen}\theta}{\cot\theta}$
$3xy+5x+4xy-2x$
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