$\int_0^{\pi}\frac{1}{1+2sen^2x}dx$
$\frac{3x^3-x^2+2x-1}{x+1}$
$4+64+81-27+10+121$
$\sqrt{x}+2\sqrt{y}=1$
$x^8-m^8$
$-2\left(-3x^2-2x+4\right)+2\left(-2x^2+3x+3\right)$
$\frac{x^{2}-36}{x^{2}-4x-12}$
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