$2a\:-\:3b\:-\:5a\:-\:2b\:+\:6b$
$\frac{2y-5}{9}=\frac{y+4}{5}$
$-1032\:+\:285$
$\int x^2\sqrt{x^3-2}dx$
$\left(3x+2\right)\left(2x+1\right)\left(2x-1\right)$
$\lim\:_{x\to\:\:0}\left(\frac{tan\left(x\right)^2}{x}\right)$
$\int\frac{1}{\sqrt{1-sen\:2x}}dx$
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