$\frac{3^8}{3^6}$
$2\cos x-\sen^{2}x\cos x=0$
$\frac{x^4+2}{x^2+3}$
$t+14=12$
$m=\left(x+8\right)\left(x+9\right)$
$\frac{3}{\frac{3}{4}}$
$\lim_{x\to1}\left(\frac{\sqrt{10+x}-4}{x+2}\right)$
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