$7^4\cdot7^{-2}$
$4g^9f^5\cdot4g^9f^5$
$\int\frac{2x-1}{x^2-4x+4}dx$
$\left(3u^2\right)\left(5u^{-8}\right)$
$\lim_{x\to2}\left(\frac{\left(x+2\right)\left(x^2-x-2\right)}{x^2-4}\right)$
$\left(5y+2m\right)^3$
$-\frac{1}{3}\int\:\:cos^3x\:dx$
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