Simplifying equation with exponents?

Hi,
I am trying to simplyfy an expression in Mathematica and I don’t seem to find a way to do it, so I am hoping somebody in the community will be able to help me out. I have this expression:
ScreenShot2014-03-28at11.26.54AM.png
And I think it should reduce to this expression:
ScreenShot2014-03-28at11.26.59AM.png
but it doesn’t…

Is is something about the assumptions that Mathematica is doing (and in that case, is there a way in which I can change it)? Or am I just missing some basic math rule?

Thanks!

JP

Use PowerExpand[%]

It worked, thank you!.