$\frac{1+cos\left(2x\right)}{3sen\:\left(2x\right)}=\frac{cot\left(x\right)}{3}$
$\left(-x^4y-y^3z^2\right)^2$
$-5+\left(-12\right)-\left(-3-12\right)$
$s^{10}-49c^{12}$
$\frac{x^{2n+1}}{2n+2}$
$\left(-5x+\sqrt{2}\right)\left(5x-2\right)$
$1+343n^6$
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