$3\log_{3x}\left(x\right)=2\log_{9x}\left(x^2\right)$
$\frac{\left(-5^7\right)}{\left(5^7\right)}$
$\left(x+3\right)\left(x^2+9\right)\left(x-3\right)$
$\frac{\left(-6\right)\cdot8}{-12}$
$b2+6b-7$
$\lim_{x\to1}\left(\frac{x+1}{x^2-1}\right)$
$\left(\:x\:+\:4\:\right)\left(\:x\:-\:4\:\right)$
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