$\lim_{x\to0001}\left(\frac{sen2x}{x}\right)$
$\left(x+2\right)^{2}+\left(x-1\right)\left(3x+1\right)+\left(2x-5\right)\left(2x+8\right)$
$2\left(1-2\right)-3\left(3x-2\right)+\left(11x-4x^2-6\right)-2\left(4x-3\right)$
$e^{\left(y-2x\right)}y'=4$
$7\left(2\right)^x-32=1760$
$x^2-11x+-21$
$\log x^2+\log2=\log8$
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