$\frac{\left(-n\right)^n}{3^{2n+1}}$
$\frac{sen4x+sen6x}{cos4x-cos6x}=cot$
$-17+4+\left(-8\right)+39$
$32^2+16\left(32\right)$
$\left(\sqrt{x}+3\right)\left(\sqrt{x-3}\right)$
$\frac{16^n}{8^n}$
$\frac{x^2+8x-12}{x-5}$
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