$\left(sin\left(x\right)\cdot sec\left(x\right)\cdot tan\left(x\right)\right)-\csc\left(x\right)\:$
$m3-m$
$\frac{x^{3+1}}{x^2-9}$
$4x+3y\cdot4x-3y$
$\left(1+sen3x\right)\:\left(1-sen3x\right)$
$12+6a$
$2x^4-2xy^2$
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