$5y+4\left(3-2y\right)+6-y$
$4^2+4^3$
$\left(-1\right)^{n-1}\left(\frac{x^n}{n}\right)$
$3t-153\le-159$
$3x\:para\:x=0$
$\int\left(\frac{1}{x+8}\right)dx$
$\lim_{x\to0}\left(\frac{sen\:2x}{x}\right)^{\frac{\left(tg\:3x\right)}{x}}$
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