$\left(2x+4\right)\left(x+5\right)$
$x^2+11x<18$
$\int\frac{x^4}{12}dx$
$x^2+4x-8y+4=0$
$cos^2\left(2x\right)-sen^2\left(2x\right)=\frac{\sqrt{3}}{2}$
$\lim_{t\to infinity}\left(\frac{1-\cos\left(x\right)}{x^2}\right)$
$\left[\left(12x+11\right)\cdot\:\left(8x+9\right)\right]$
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