$12x^2-24x^3$
$x^2+11x+1$
$\left(9.0\cdot10^9\right)\left(1.10^{-6}\right)\left(2.5\cdot10^{-6}\right)$
$2d+\left(y+d\right)$
$\left(sen\:x\:+1\right)^2=sen^2x+1$
$\lim_{x\to1}\left(\frac{x^7-1}{x^{30}-1}\right)$
$-2\cdot\left(5+7\right)$
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