Question: Combining square roots of expressions in Maple, how to?

Hello all. I have a probably simple problem, that is drinving me totally crazy. I have a expression having:



and it refuses to simplify. I told maple assume(m>0, M>0), etc. But it doesn't want to simplify. Anyone has any ideas?





Edit: uploaded the mw file, so it can be seen what the problem

[I added Physics to the tags.--Carl Love as moderator]

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