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HELP!


I have this exprision:
                            (-1)^4L Sqrt[(2L+1)^3]/(Sqrt[L/(L+1)]
Sqrt[L(L+1)] (2L+1)^(3/2)
And I would like to simplify it using Mathematica to get 1/L, where L is
positive integer. Simplify and FullSimplify dos not work in this case! Can
any one help me?

Thanks




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