I can't seem to compile
\log_{b+c}{a} + \log_{c-b}{a} =
2\left(\log_{b+c}\right)\left({A}\log_{c-b}{a}\right)
especially the bases like
also don't see \log{ }{ } in the quick-menu
We're not quite back up to full LaTeX functionality, but MathGuru is working on it.
One possible solution is post 8 of this thread.
-Dan