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   http://functions.wolfram.com/01.07.21.1382.01
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    Integrate[Sqrt[(a + b Cos[c z]^2)^5], z] == 
 (Sqrt[(2 a + b + b Cos[2 c z])^5] (32 (23 a^3 + 46 a^2 b + 31 a b^2 + 8 b^3) 
     Sqrt[(2 a + b + b Cos[2 c z])/(a + b)] EllipticE[c z, b/(a + b)] - 
    128 a (2 a^2 + 3 a b + b^2) Sqrt[(2 a + b + b Cos[2 c z])/(a + b)] 
     EllipticF[c z, b/(a + b)] + 2 Sqrt[2] b (88 a^2 + 88 a b + 25 b^2 + 
      28 b (2 a + b) Cos[2 c z] + 3 b^2 Cos[4 c z]) Sin[2 c z]))/
  (480 c (2 a + b + b Cos[2 c z])^3) 
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   Cell[BoxData[RowBox[List[RowBox[List["\[Integral]", RowBox[List[SqrtBox[SuperscriptBox[RowBox[List["(", RowBox[List["a", "+", RowBox[List["b", " ", SuperscriptBox[RowBox[List["Cos", "[", RowBox[List["c", " ", "z"]], "]"]], "2"]]]]], ")"]], "5"]], RowBox[List["\[DifferentialD]", "z"]]]]]], "\[Equal]", RowBox[List[RowBox[List["(", RowBox[List[SqrtBox[SuperscriptBox[RowBox[List["(", RowBox[List[RowBox[List["2", " ", "a"]], "+", "b", "+", RowBox[List["b", " ", RowBox[List["Cos", "[", RowBox[List["2", " ", "c", " ", "z"]], "]"]]]]]], ")"]], "5"]], " ", RowBox[List["(", RowBox[List[RowBox[List["32", " ", RowBox[List["(", RowBox[List[RowBox[List["23", " ", SuperscriptBox["a", "3"]]], "+", RowBox[List["46", " ", SuperscriptBox["a", "2"], " ", "b"]], "+", RowBox[List["31", " ", "a", " ", SuperscriptBox["b", "2"]]], "+", RowBox[List["8", " ", SuperscriptBox["b", "3"]]]]], ")"]], " ", SqrtBox[FractionBox[RowBox[List[RowBox[List["2", " ", "a"]], "+", "b", "+", RowBox[List["b", " ", RowBox[List["Cos", "[", RowBox[List["2", " ", "c", " ", "z"]], "]"]]]]]], RowBox[List["a", "+", "b"]]]], " ", RowBox[List["EllipticE", "[", RowBox[List[RowBox[List["c", " ", "z"]], ",", FractionBox["b", RowBox[List["a", "+", "b"]]]]], "]"]]]], "-", RowBox[List["128", " ", "a", " ", RowBox[List["(", RowBox[List[RowBox[List["2", " ", SuperscriptBox["a", "2"]]], "+", RowBox[List["3", " ", "a", " ", "b"]], "+", SuperscriptBox["b", "2"]]], ")"]], " ", SqrtBox[FractionBox[RowBox[List[RowBox[List["2", " ", "a"]], "+", "b", "+", RowBox[List["b", " ", RowBox[List["Cos", "[", RowBox[List["2", " ", "c", " ", "z"]], "]"]]]]]], RowBox[List["a", "+", "b"]]]], " ", RowBox[List["EllipticF", "[", RowBox[List[RowBox[List["c", " ", "z"]], ",", FractionBox["b", RowBox[List["a", "+", "b"]]]]], "]"]]]], "+", RowBox[List["2", " ", SqrtBox["2"], " ", "b", " ", RowBox[List["(", RowBox[List[RowBox[List["88", " ", SuperscriptBox["a", "2"]]], "+", RowBox[List["88", " ", "a", " ", "b"]], "+", RowBox[List["25", " ", SuperscriptBox["b", "2"]]], "+", RowBox[List["28", " ", "b", " ", RowBox[List["(", RowBox[List[RowBox[List["2", " ", "a"]], "+", "b"]], ")"]], " ", RowBox[List["Cos", "[", RowBox[List["2", " ", "c", " ", "z"]], "]"]]]], "+", RowBox[List["3", " ", SuperscriptBox["b", "2"], " ", RowBox[List["Cos", "[", RowBox[List["4", " ", "c", " ", "z"]], "]"]]]]]], ")"]], " ", RowBox[List["Sin", "[", RowBox[List["2", " ", "c", " ", "z"]], "]"]]]]]], ")"]]]], ")"]], "/", RowBox[List["(", RowBox[List["480", " ", "c", " ", SuperscriptBox[RowBox[List["(", RowBox[List[RowBox[List["2", " ", "a"]], "+", "b", "+", RowBox[List["b", " ", RowBox[List["Cos", "[", RowBox[List["2", " ", "c", " ", "z"]], "]"]]]]]], ")"]], "3"]]], ")"]]]]]]]] 
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   <math xmlns='http://www.w3.org/1998/Math/MathML' mathematica:form='TraditionalForm' xmlns:mathematica='http://www.wolfram.com/XML/'>  <semantics>  <mrow>  <mrow>  <mo> ∫ </mo>  <mrow>  <msqrt>  <msup>  <mrow>  <mo> ( </mo>  <mrow>  <mi> a </mi>  <mo> + </mo>  <mrow>  <mi> b </mi>  <mo> ⁢ </mo>  <mrow>  <msup>  <mi> cos </mi>  <mn> 2 </mn>  </msup>  <mo> ( </mo>  <mrow>  <mi> c </mi>  <mo> ⁢ </mo>  <mi> z </mi>  </mrow>  <mo> ) </mo>  </mrow>  </mrow>  </mrow>  <mo> ) </mo>  </mrow>  <mn> 5 </mn>  </msup>  </msqrt>  <mo> ⁢ </mo>  <mrow>  <mo> ⅆ </mo>  <mi> z </mi>  </mrow>  </mrow>  </mrow>  <mo> ⩵ </mo>  <mrow>  <mrow>  <mo> ( </mo>  <mrow>  <msqrt>  <msup>  <mrow>  <mo> ( </mo>  <mrow>  <mrow>  <mn> 2 </mn>  <mo> ⁢ </mo>  <mi> a </mi>  </mrow>  <mo> + </mo>  <mi> b </mi>  <mo> + </mo>  <mrow>  <mi> b </mi>  <mo> ⁢ </mo>  <mrow>  <mi> cos </mi>  <mo> ⁡ </mo>  <mo> ( </mo>  <mrow>  <mn> 2 </mn>  <mo> ⁢ </mo>  <mi> c </mi>  <mo> ⁢ </mo>  <mi> z </mi>  </mrow>  <mo> ) </mo>  </mrow>  </mrow>  </mrow>  <mo> ) </mo>  </mrow>  <mn> 5 </mn>  </msup>  </msqrt>  <mo> ⁢ </mo>  <mrow>  <mo> ( </mo>  <mrow>  <mrow>  <mn> 32 </mn>  <mo> ⁢ </mo>  <msqrt>  <mfrac>  <mrow>  <mrow>  <mn> 2 </mn>  <mo> ⁢ </mo>  <mi> a </mi>  </mrow>  <mo> + </mo>  <mi> b </mi>  <mo> + </mo>  <mrow>  <mi> b </mi>  <mo> ⁢ </mo>  <mrow>  <mi> cos </mi>  <mo> ⁡ </mo>  <mo> ( </mo>  <mrow>  <mn> 2 </mn>  <mo> ⁢ </mo>  <mi> c </mi>  <mo> ⁢ </mo>  <mi> z </mi>  </mrow>  <mo> ) </mo>  </mrow>  </mrow>  </mrow>  <mrow>  <mi> a </mi>  <mo> + </mo>  <mi> b </mi>  </mrow>  </mfrac>  </msqrt>  <mo> ⁢ </mo>  <mrow>  <mo> ( </mo>  <mrow>  <mrow>  <mn> 23 </mn>  <mo> ⁢ </mo>  <msup>  <mi> a </mi>  <mn> 3 </mn>  </msup>  </mrow>  <mo> + </mo>  <mrow>  <mn> 46 </mn>  <mo> ⁢ </mo>  <mi> b </mi>  <mo> ⁢ </mo>  <msup>  <mi> a </mi>  <mn> 2 </mn>  </msup>  </mrow>  <mo> + </mo>  <mrow>  <mn> 31 </mn>  <mo> ⁢ </mo>  <msup>  <mi> b </mi>  <mn> 2 </mn>  </msup>  <mo> ⁢ </mo>  <mi> a </mi>  </mrow>  <mo> + </mo>  <mrow>  <mn> 8 </mn>  <mo> ⁢ </mo>  <msup>  <mi> b </mi>  <mn> 3 </mn>  </msup>  </mrow>  </mrow>  <mo> ) </mo>  </mrow>  <mo> ⁢ </mo>  <mrow>  <mi> E </mi>  <mo> ⁡ </mo>  <mo> ( </mo>  <mrow>  <mrow>  <mi> c </mi>  <mo> ⁢ </mo>  <mi> z </mi>  </mrow>  <mo> ❘ </mo>  <mfrac>  <mi> b </mi>  <mrow>  <mi> a </mi>  <mo> + </mo>  <mi> b </mi>  </mrow>  </mfrac>  </mrow>  <mo> ) </mo>  </mrow>  </mrow>  <mo> - </mo>  <mrow>  <mn> 128 </mn>  <mo> ⁢ </mo>  <mi> a </mi>  <mo> ⁢ </mo>  <mrow>  <mo> ( </mo>  <mrow>  <mrow>  <mn> 2 </mn>  <mo> ⁢ </mo>  <msup>  <mi> a </mi>  <mn> 2 </mn>  </msup>  </mrow>  <mo> + </mo>  <mrow>  <mn> 3 </mn>  <mo> ⁢ </mo>  <mi> b </mi>  <mo> ⁢ </mo>  <mi> a </mi>  </mrow>  <mo> + </mo>  <msup>  <mi> b </mi>  <mn> 2 </mn>  </msup>  </mrow>  <mo> ) </mo>  </mrow>  <mo> ⁢ </mo>  <msqrt>  <mfrac>  <mrow>  <mrow>  <mn> 2 </mn>  <mo> ⁢ </mo>  <mi> a </mi>  </mrow>  <mo> + </mo>  <mi> b </mi>  <mo> + </mo>  <mrow>  <mi> b </mi>  <mo> ⁢ </mo>  <mrow>  <mi> cos </mi>  <mo> ⁡ </mo>  <mo> ( </mo>  <mrow>  <mn> 2 </mn>  <mo> ⁢ </mo>  <mi> c </mi>  <mo> ⁢ </mo>  <mi> z </mi>  </mrow>  <mo> ) </mo>  </mrow>  </mrow>  </mrow>  <mrow>  <mi> a </mi>  <mo> + </mo>  <mi> b </mi>  </mrow>  </mfrac>  </msqrt>  <mo> ⁢ </mo>  <mrow>  <mi> F </mi>  <mo> ⁡ </mo>  <mo> ( </mo>  <mrow>  <mrow>  <mi> c </mi>  <mo> ⁢ </mo>  <mi> z </mi>  </mrow>  <mo> ❘ </mo>  <mfrac>  <mi> b </mi>  <mrow>  <mi> a </mi>  <mo> + </mo>  <mi> b </mi>  </mrow>  </mfrac>  </mrow>  <mo> ) </mo>  </mrow>  </mrow>  <mo> + </mo>  <mrow>  <mn> 2 </mn>  <mo> ⁢ </mo>  <msqrt>  <mn> 2 </mn>  </msqrt>  <mo> ⁢ </mo>  <mi> b </mi>  <mo> ⁢ </mo>  <mrow>  <mo> ( </mo>  <mrow>  <mrow>  <mn> 88 </mn>  <mo> ⁢ </mo>  <msup>  <mi> a </mi>  <mn> 2 </mn>  </msup>  </mrow>  <mo> + </mo>  <mrow>  <mn> 88 </mn>  <mo> ⁢ </mo>  <mi> b </mi>  <mo> ⁢ </mo>  <mi> a </mi>  </mrow>  <mo> + </mo>  <mrow>  <mn> 25 </mn>  <mo> ⁢ </mo>  <msup>  <mi> b </mi>  <mn> 2 </mn>  </msup>  </mrow>  <mo> + </mo>  <mrow>  <mn> 28 </mn>  <mo> ⁢ </mo>  <mi> b </mi>  <mo> ⁢ </mo>  <mrow>  <mo> ( </mo>  <mrow>  <mrow>  <mn> 2 </mn>  <mo> ⁢ </mo>  <mi> a </mi>  </mrow>  <mo> + </mo>  <mi> b </mi>  </mrow>  <mo> ) </mo>  </mrow>  <mo> ⁢ </mo>  <mrow>  <mi> cos </mi>  <mo> ⁡ </mo>  <mo> ( </mo>  <mrow>  <mn> 2 </mn>  <mo> ⁢ </mo>  <mi> c </mi>  <mo> ⁢ </mo>  <mi> z </mi>  </mrow>  <mo> ) </mo>  </mrow>  </mrow>  <mo> + </mo>  <mrow>  <mn> 3 </mn>  <mo> ⁢ </mo>  <msup>  <mi> b </mi>  <mn> 2 </mn>  </msup>  <mo> ⁢ </mo>  <mrow>  <mi> cos </mi>  <mo> ⁡ </mo>  <mo> ( </mo>  <mrow>  <mn> 4 </mn>  <mo> ⁢ </mo>  <mi> c </mi>  <mo> ⁢ </mo>  <mi> z </mi>  </mrow>  <mo> ) </mo>  </mrow>  </mrow>  </mrow>  <mo> ) </mo>  </mrow>  <mo> ⁢ </mo>  <mrow>  <mi> sin </mi>  <mo> ⁡ </mo>  <mo> ( </mo>  <mrow>  <mn> 2 </mn>  <mo> ⁢ </mo>  <mi> c </mi>  <mo> ⁢ </mo>  <mi> z </mi>  </mrow>  <mo> ) </mo>  </mrow>  </mrow>  </mrow>  <mo> ) </mo>  </mrow>  </mrow>  <mo> ) </mo>  </mrow>  <mo> / </mo>  <mrow>  <mo> ( </mo>  <mrow>  <mn> 480 </mn>  <mo> ⁢ </mo>  <mi> c </mi>  <mo> ⁢ </mo>  <msup>  <mrow>  <mo> ( </mo>  <mrow>  <mrow>  <mn> 2 </mn>  <mo> ⁢ </mo>  <mi> a </mi>  </mrow>  <mo> + </mo>  <mi> b </mi>  <mo> + </mo>  <mrow>  <mi> b </mi>  <mo> ⁢ </mo>  <mrow>  <mi> cos </mi>  <mo> ⁡ </mo>  <mo> ( </mo>  <mrow>  <mn> 2 </mn>  <mo> ⁢ </mo>  <mi> c </mi>  <mo> ⁢ </mo>  <mi> z </mi>  </mrow>  <mo> ) </mo>  </mrow>  </mrow>  </mrow>  <mo> ) </mo>  </mrow>  <mn> 3 </mn>  </msup>  </mrow>  <mo> ) </mo>  </mrow>  </mrow>  </mrow>  <annotation-xml encoding='MathML-Content'>  <apply>  <eq />  <apply>  <int />  <bvar>  <ci> z </ci>  </bvar>  <apply>  <power />  <apply>  <power />  <apply>  <plus />  <ci> a </ci>  <apply>  <times />  <ci> b </ci>  <apply>  <power />  <apply>  <cos />  <apply>  <times />  <ci> c </ci>  <ci> z </ci>  </apply>  </apply>  <cn type='integer'> 2 </cn>  </apply>  </apply>  </apply>  <cn type='integer'> 5 </cn>  </apply>  <cn type='rational'> 1 <sep /> 2 </cn>  </apply>  </apply>  <apply>  <times />  <apply>  <times />  <apply>  <power />  <apply>  <power />  <apply>  <plus />  <apply>  <times />  <cn type='integer'> 2 </cn>  <ci> a </ci>  </apply>  <ci> b </ci>  <apply>  <times />  <ci> b </ci>  <apply>  <cos />  <apply>  <times />  <cn type='integer'> 2 </cn>  <ci> c </ci>  <ci> z </ci>  </apply>  </apply>  </apply>  </apply>  <cn type='integer'> 5 </cn>  </apply>  <cn type='rational'> 1 <sep /> 2 </cn>  </apply>  <apply>  <plus />  <apply>  <times />  <cn type='integer'> 32 </cn>  <apply>  <power />  <apply>  <times />  <apply>  <plus />  <apply>  <times />  <cn type='integer'> 2 </cn>  <ci> a </ci>  </apply>  <ci> b </ci>  <apply>  <times />  <ci> b </ci>  <apply>  <cos />  <apply>  <times />  <cn type='integer'> 2 </cn>  <ci> c </ci>  <ci> z </ci>  </apply>  </apply>  </apply>  </apply>  <apply>  <power />  <apply>  <plus />  <ci> a </ci>  <ci> b </ci>  </apply>  <cn type='integer'> -1 </cn>  </apply>  </apply>  <cn type='rational'> 1 <sep /> 2 </cn>  </apply>  <apply>  <plus />  <apply>  <times />  <cn type='integer'> 23 </cn>  <apply>  <power />  <ci> a </ci>  <cn type='integer'> 3 </cn>  </apply>  </apply>  <apply>  <times />  <cn type='integer'> 46 </cn>  <ci> b </ci>  <apply>  <power />  <ci> a </ci>  <cn type='integer'> 2 </cn>  </apply>  </apply>  <apply>  <times />  <cn type='integer'> 31 </cn>  <apply>  <power />  <ci> b </ci>  <cn type='integer'> 2 </cn>  </apply>  <ci> a </ci>  </apply>  <apply>  <times />  <cn type='integer'> 8 </cn>  <apply>  <power />  <ci> b </ci>  <cn type='integer'> 3 </cn>  </apply>  </apply>  </apply>  <apply>  <ci> EllipticE </ci>  <apply>  <times />  <ci> c </ci>  <ci> z </ci>  </apply>  <apply>  <times />  <ci> b </ci>  <apply>  <power />  <apply>  <plus />  <ci> a </ci>  <ci> b </ci>  </apply>  <cn type='integer'> -1 </cn>  </apply>  </apply>  </apply>  </apply>  <apply>  <times />  <cn type='integer'> -1 </cn>  <apply>  <times />  <cn type='integer'> 128 </cn>  <ci> a </ci>  <apply>  <plus />  <apply>  <times />  <cn type='integer'> 2 </cn>  <apply>  <power />  <ci> a </ci>  <cn type='integer'> 2 </cn>  </apply>  </apply>  <apply>  <times />  <cn type='integer'> 3 </cn>  <ci> b </ci>  <ci> a </ci>  </apply>  <apply>  <power />  <ci> b </ci>  <cn type='integer'> 2 </cn>  </apply>  </apply>  <apply>  <power />  <apply>  <times />  <apply>  <plus />  <apply>  <times />  <cn type='integer'> 2 </cn>  <ci> a </ci>  </apply>  <ci> b </ci>  <apply>  <times />  <ci> b </ci>  <apply>  <cos />  <apply>  <times />  <cn type='integer'> 2 </cn>  <ci> c </ci>  <ci> z </ci>  </apply>  </apply>  </apply>  </apply>  <apply>  <power />  <apply>  <plus />  <ci> a </ci>  <ci> b </ci>  </apply>  <cn type='integer'> -1 </cn>  </apply>  </apply>  <cn type='rational'> 1 <sep /> 2 </cn>  </apply>  <apply>  <ci> EllipticF </ci>  <apply>  <times />  <ci> c </ci>  <ci> z </ci>  </apply>  <apply>  <times />  <ci> b </ci>  <apply>  <power />  <apply>  <plus />  <ci> a </ci>  <ci> b </ci>  </apply>  <cn type='integer'> -1 </cn>  </apply>  </apply>  </apply>  </apply>  </apply>  <apply>  <times />  <cn type='integer'> 2 </cn>  <apply>  <power />  <cn type='integer'> 2 </cn>  <cn type='rational'> 1 <sep /> 2 </cn>  </apply>  <ci> b </ci>  <apply>  <plus />  <apply>  <times />  <cn type='integer'> 88 </cn>  <apply>  <power />  <ci> a </ci>  <cn type='integer'> 2 </cn>  </apply>  </apply>  <apply>  <times />  <cn type='integer'> 88 </cn>  <ci> b </ci>  <ci> a </ci>  </apply>  <apply>  <times />  <cn type='integer'> 25 </cn>  <apply>  <power />  <ci> b </ci>  <cn type='integer'> 2 </cn>  </apply>  </apply>  <apply>  <times />  <cn type='integer'> 28 </cn>  <ci> b </ci>  <apply>  <plus />  <apply>  <times />  <cn type='integer'> 2 </cn>  <ci> a </ci>  </apply>  <ci> b </ci>  </apply>  <apply>  <cos />  <apply>  <times />  <cn type='integer'> 2 </cn>  <ci> c </ci>  <ci> z </ci>  </apply>  </apply>  </apply>  <apply>  <times />  <cn type='integer'> 3 </cn>  <apply>  <power />  <ci> b </ci>  <cn type='integer'> 2 </cn>  </apply>  <apply>  <cos />  <apply>  <times />  <cn type='integer'> 4 </cn>  <ci> c </ci>  <ci> z </ci>  </apply>  </apply>  </apply>  </apply>  <apply>  <sin />  <apply>  <times />  <cn type='integer'> 2 </cn>  <ci> c </ci>  <ci> z </ci>  </apply>  </apply>  </apply>  </apply>  </apply>  <apply>  <power />  <apply>  <times />  <cn type='integer'> 480 </cn>  <ci> c </ci>  <apply>  <power />  <apply>  <plus />  <apply>  <times />  <cn type='integer'> 2 </cn>  <ci> a </ci>  </apply>  <ci> b </ci>  <apply>  <times />  <ci> b </ci>  <apply>  <cos />  <apply>  <times />  <cn type='integer'> 2 </cn>  <ci> c </ci>  <ci> z </ci>  </apply>  </apply>  </apply>  </apply>  <cn type='integer'> 3 </cn>  </apply>  </apply>  <cn type='integer'> -1 </cn>  </apply>  </apply>  </apply>  </annotation-xml>  </semantics>  </math> 
   
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