$\frac{1+x}{1-x}\geq1$
$\int sen^2\left(7x-2\right)dx$
$\frac{2\cdot sen^2\left(x\right)}{cos\left(x\right)}$
$1000-b\:^3-\:10-b$
$3\left(x+5\right)+6=5+5\left(x+2\right)$
$4n^2+n-33=0$
$\int x\left(\frac{x^3}{4}+\frac{4}{x^2}\right)dx$
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