$log_{\left(9\right)}\left(2n^2-14n\right)=log_{\left(9\right)}\left(-45+n^2\right)$
$-6xy+4yx\:=\:-2xy$
$m^2-4m+4$
$2x\:+5\:-\:0.75x\:+\:2$
$\frac{r}{16}<1$
$\frac{dx}{dy}=\frac{1+y}{y^2x^2}$
$\frac{n}{n+3}+\frac{12n}{n-3}-\frac{9}{n^2-9}$
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