$\left(3x+2\right)\left(3x-b\right)$
$\int\frac{2x^2}{x^3-2x^2+3}dx$
$\int x\left(cos2x-sin5x\right)dx$
$\sqrt{9-x=2}$
$\left(\frac{1}{2}x^2-4x\right)^3$
$\left(-1\right)^3-\:5\left(-1\right)^3+4\left(-1\right)+1$
$\lim_{x\to0}\left(\frac{e^x-1-x-\frac{1}{2}x^2-\frac{1}{6}x^3}{x^3}\right)$
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