$\log\left(x+1\right)+\log\left(x+2\right)=1$
$x^{30}-2x$
$\left(x^2-9\right)\left(x^2+8\right)$
$-2+4cos^2x+7cosx=0$
$\left(x+3\right)^2+3x=\left(x-3\right)^2+6\left(14-x\right)$
$\log\left(x+6\right)-\log\left(x+2\right)=\log\left(x\right)$
$\log6\left(\frac{1}{6}\right)$
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