$\left(-7\right)\cdot\left|\left(+1\right)+\left(+3\right)-\left(2+5-1\right)\right|$
$-\left(m+3\right)^3$
$2x^2+6x+5=0$
$\frac{d}{dx}\left(arc\:tan\:\left(\frac{xsen2}{1-xsen2}\right)\right)$
$180x+81$
$70x^2+148x+16$
$\frac{dc}{dq}=0.08q^2-1.6q+6.5$
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