$\frac{\left(n+1\right)}{3^n}\left(x-2\right)^n$
$\frac{7\left(3\right)-9}{\left(3\right)^2-3\left(3\right)+4}$
$\left(\sqrt{5a^3}b\right)\left(4ab\sqrt{5}c\right)$
$\left(8a^3b^2\right)\left(2a^2b\right)$
$\int\:4\arcsin\:\left(9x\right)dx$
$\frac{\left(4x^4-3x^4\right)}{4}$
$\lim_{x\to1}\left(\frac{x^3-3x+2}{x^3-4x^2+5x-2}\right)$
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