$\frac{2x+14}{x+4}=\frac{2x+20}{2x+8}$
$x+2=\sqrt{5x+5}$
$2800\cdot27$
$7x^{-3}\cdot7x$
$\left(4x^6+2x^{\:3}+1\right)\left(4x^6-2x^3+1\right)$
$\lim_{x\to2}\left(x-2\right)^2\ln\left(x-2\right)$
$5x+7y+11x+3y$
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