$\int\frac{x+2}{1-x^2}dx$
$5\left(x\:-\:x\:\right)\:-\left(3x-5\right)-7x+25$
$\left(5a+7b-3c\right)\left(b-5c+2a\right)$
$\int\left(\frac{4u^2-u+1}{\left(u+1\right)\left(u^2-u+1\right)}\right)du$
$3-\left(12-7\right)\left(-5\right)\left(2\right)+5$
$20x-5x^2$
$\cos u\left(\frac{5}{8}\right)$
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