$-5+6-8+3-11+4+2-7$
$\left(1-sen^2\:\left(x\right)\right)\left(\cot^2\left(x\right)+1\right)$
$\left(x-2\right)y\left(x+2\right)$
$\left(3a+b^2\right)^2$
$\frac{dy}{dx}=\left(x+y\right)-1$
$\left(x^4+y^7\right)^2$
$10m-8n+14a$
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