$\int\frac{\left(2x+6\right)}{x}dx$
$\frac{64m^3-125n^3}{4m+5m}$
$\left(3z+5y\right)\left(3z-5y\right)$
$5a^{2-20ab}$
$\lim_{x\to0}\left(\ln\left(x\right).\ln\left(1-x\right)\right)$
$\left(-30\right)\:\left(-3\right)$
$7c^2-15c+3$
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