$2.63+1.80+3.67$
$-m^2\cdot\left(m^0n^4\right)^5$
$\frac{d}{dx}2$
$q^2+\:6q\:+9$
$\cos\left(v\right)\cdot\csc\left(v\right)^2$
$1-2\sen^{2}t=2\cos^{2}t-1$
$1\cdot1\cdot\left(x^2\right)$
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