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   http://functions.wolfram.com/01.03.21.0493.01
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    Integrate[Sqrt[a + b E^(c z)]/(d + e E^(c z)), z] == 
 (-2 Sqrt[a] ArcTanh[Sqrt[a + b E^(c z)]/Sqrt[a]] + 
   (2 Sqrt[(-b) d + a e] ArcTanh[(Sqrt[e] Sqrt[a + b E^(c z)])/
       Sqrt[(-b) d + a e]])/Sqrt[e])/(c d) 
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   Cell[BoxData[RowBox[List[RowBox[List["\[Integral]", RowBox[List[FractionBox[SqrtBox[RowBox[List["a", "+", RowBox[List["b", " ", SuperscriptBox["\[ExponentialE]", RowBox[List["c", " ", "z"]]]]]]]], RowBox[List["d", "+", RowBox[List["e", " ", SuperscriptBox["\[ExponentialE]", RowBox[List["c", " ", "z"]]]]]]]], RowBox[List["\[DifferentialD]", "z"]]]]]], "\[Equal]", FractionBox[RowBox[List[RowBox[List[RowBox[List["-", "2"]], " ", SqrtBox["a"], " ", RowBox[List["ArcTanh", "[", FractionBox[SqrtBox[RowBox[List["a", "+", RowBox[List["b", " ", SuperscriptBox["\[ExponentialE]", RowBox[List["c", " ", "z"]]]]]]]], SqrtBox["a"]], "]"]]]], "+", FractionBox[RowBox[List["2", " ", SqrtBox[RowBox[List[RowBox[List[RowBox[List["-", "b"]], " ", "d"]], "+", RowBox[List["a", " ", "e"]]]]], " ", RowBox[List["ArcTanh", "[", FractionBox[RowBox[List[SqrtBox["e"], " ", SqrtBox[RowBox[List["a", "+", RowBox[List["b", " ", SuperscriptBox["\[ExponentialE]", RowBox[List["c", " ", "z"]]]]]]]]]], SqrtBox[RowBox[List[RowBox[List[RowBox[List["-", "b"]], " ", "d"]], "+", RowBox[List["a", " ", "e"]]]]]], "]"]]]], SqrtBox["e"]]]], RowBox[List["c", " ", "d"]]]]]]] 
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   Date Added to functions.wolfram.com (modification date)
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