$n+5+3-2n$
$\int e^x\cdot sen\left(3-x\right)\:$
$-16\cdot10$
$23^3\:+32^2\:+4$
$-2cos\left(3x\right)=1$
$\left(3xy^3+9z^2\right)^2$
$-2-4+1-12-2+9$
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