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## Main Question or Discussion Point

I've been trying to figure out how the passage from formula (4) to formula (5) of Loll & Westra's paper http://arxiv.org/abs/hep-th/0306183 is made, but I could not fill in the details of the calculations. Can anyone give me some help (whatever it is: tips, parts of the calculations, the whole one ) ...)?

Thanks,

Roberto.

Thanks,

Roberto.