$\:log5\:\left(12x+5\right)=3$
$9ab\:+\:7ab$
$u^2-14u+49$
$\frac{12}{3}+\frac{8}{1}$
$-2\ln\left(3y-1\right)=-4x-2\ln\left(3\right)$
$x^2+2x+1<0$
$4x^2+x^3-6x^2$
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