$-y-10y$
$\sqrt{3x+1}x=0$
$\int\left(1+sen^3x\right)\left(senxcosx\right)dx$
$\lim_{x\to-k}\left(\frac{6x^2+kx+k+2}{x^2+x-6}\right)$
$-\:3m\:-3m^2$
$\left(6x\:5\:+\:x\:4\:+\:4x\:2\:-\:7x\:+\:1\right)\left(2x\:2\:+\:x\:-\:3\right)$
$2x''-2x''+1$
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