$\:\int\frac{e^x}{\sqrt{9-4e^{2x}}}dx$
$\frac{x}{10}\left(\frac{5x}{1}\right)$
$\sec\left(4\right)x-1=\tan\left(4\right)x+2\tan\left(2\right)x$
$8z+3xy+12z$
$\left(30a^4-13b^5\right)^2$
$\int\frac{1}{\left(x+1\right)^2}dx$
$9a^2-6ab+b^2$
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