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[itex]\int \frac{e^{-ax}}{1+be^{-cx}}dx[/itex]

where [itex]a>0[/itex], [itex]b>0[/itex] and [itex]c>0[/itex].

I have found out this integral has a solution in terms of the Gaussian hypergeometric function http://en.wikipedia.org/wiki/Hypergeometric_function but it looks to me that it should have a solution in terms of simple mathematical functions.

Is there any solution to this integral in terms of simple functions?

Thanks in advance