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   http://functions.wolfram.com/01.20.21.0121.01
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    Integrate[(1/z^2) Cosh[a z^2 + b], z] == 
 (1/(2 z)) (-2 Cosh[b + a z^2] + Sqrt[a] Sqrt[Pi] z Erf[Sqrt[a] z] 
    (-Cosh[b] + Sinh[b]) + Sqrt[a] Sqrt[Pi] z Erfi[Sqrt[a] z] 
    (Cosh[b] + Sinh[b])) 
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   Cell[BoxData[RowBox[List[RowBox[List["\[Integral]", RowBox[List[FractionBox["1", SuperscriptBox["z", "2"]], RowBox[List["Cosh", "[", RowBox[List[RowBox[List["a", " ", SuperscriptBox["z", "2"]]], "+", "b"]], "]"]], RowBox[List["\[DifferentialD]", "z"]]]]]], "\[Equal]", RowBox[List[FractionBox["1", RowBox[List["2", " ", "z"]]], RowBox[List["(", RowBox[List[RowBox[List[RowBox[List["-", "2"]], " ", RowBox[List["Cosh", "[", RowBox[List["b", "+", RowBox[List["a", " ", SuperscriptBox["z", "2"]]]]], "]"]]]], "+", RowBox[List[SqrtBox["a"], " ", SqrtBox["\[Pi]"], " ", "z", " ", RowBox[List["Erf", "[", RowBox[List[SqrtBox["a"], " ", "z"]], "]"]], " ", RowBox[List["(", RowBox[List[RowBox[List["-", RowBox[List["Cosh", "[", "b", "]"]]]], "+", RowBox[List["Sinh", "[", "b", "]"]]]], ")"]]]], "+", RowBox[List[SqrtBox["a"], " ", SqrtBox["\[Pi]"], " ", "z", " ", RowBox[List["Erfi", "[", RowBox[List[SqrtBox["a"], " ", "z"]], "]"]], " ", RowBox[List["(", RowBox[List[RowBox[List["Cosh", "[", "b", "]"]], "+", RowBox[List["Sinh", "[", "b", "]"]]]], ")"]]]]]], ")"]]]]]]]] 
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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>  <mfrac>  <mrow>  <mi> cosh </mi>  <mo> ⁡ </mo>  <mo> ( </mo>  <mrow>  <mrow>  <mi> a </mi>  <mo> ⁢ </mo>  <msup>  <mi> z </mi>  <mn> 2 </mn>  </msup>  </mrow>  <mo> + </mo>  <mi> b </mi>  </mrow>  <mo> ) </mo>  </mrow>  <msup>  <mi> z </mi>  <mn> 2 </mn>  </msup>  </mfrac>  <mo> ⁢ </mo>  <mrow>  <mo> ⅆ </mo>  <mi> z </mi>  </mrow>  </mrow>  </mrow>  <mo> ⩵ </mo>  <mrow>  <mfrac>  <mn> 1 </mn>  <mrow>  <mn> 2 </mn>  <mo> ⁢ </mo>  <mi> z </mi>  </mrow>  </mfrac>  <mo> ⁢ </mo>  <mrow>  <mo> ( </mo>  <mrow>  <mrow>  <mrow>  <mo> - </mo>  <mn> 2 </mn>  </mrow>  <mo> ⁢ </mo>  <mrow>  <mi> cosh </mi>  <mo> ⁡ </mo>  <mo> ( </mo>  <mrow>  <mrow>  <mi> a </mi>  <mo> ⁢ </mo>  <msup>  <mi> z </mi>  <mn> 2 </mn>  </msup>  </mrow>  <mo> + </mo>  <mi> b </mi>  </mrow>  <mo> ) </mo>  </mrow>  </mrow>  <mo> + </mo>  <mrow>  <msqrt>  <mi> a </mi>  </msqrt>  <mo> ⁢ </mo>  <msqrt>  <mi> π </mi>  </msqrt>  <mo> ⁢ </mo>  <mi> z </mi>  <mo> ⁢ </mo>  <mrow>  <mi> erf </mi>  <mo> ⁡ </mo>  <mo> ( </mo>  <mrow>  <msqrt>  <mi> a </mi>  </msqrt>  <mo> ⁢ </mo>  <mi> z </mi>  </mrow>  <mo> ) </mo>  </mrow>  <mo> ⁢ </mo>  <mrow>  <mo> ( </mo>  <mrow>  <mrow>  <mi> sinh </mi>  <mo> ⁡ </mo>  <mo> ( </mo>  <mi> b </mi>  <mo> ) </mo>  </mrow>  <mo> - </mo>  <mrow>  <mi> cosh </mi>  <mo> ⁡ </mo>  <mo> ( </mo>  <mi> b </mi>  <mo> ) </mo>  </mrow>  </mrow>  <mo> ) </mo>  </mrow>  </mrow>  <mo> + </mo>  <mrow>  <msqrt>  <mi> a </mi>  </msqrt>  <mo> ⁢ </mo>  <msqrt>  <mi> π </mi>  </msqrt>  <mo> ⁢ </mo>  <mi> z </mi>  <mo> ⁢ </mo>  <mrow>  <mi> erfi </mi>  <mo> ⁡ </mo>  <mo> ( </mo>  <mrow>  <msqrt>  <mi> a </mi>  </msqrt>  <mo> ⁢ </mo>  <mi> z </mi>  </mrow>  <mo> ) </mo>  </mrow>  <mo> ⁢ </mo>  <mrow>  <mo> ( </mo>  <mrow>  <mrow>  <mi> cosh </mi>  <mo> ⁡ </mo>  <mo> ( </mo>  <mi> b </mi>  <mo> ) </mo>  </mrow>  <mo> + </mo>  <mrow>  <mi> sinh </mi>  <mo> ⁡ </mo>  <mo> ( </mo>  <mi> b </mi>  <mo> ) </mo>  </mrow>  </mrow>  <mo> ) </mo>  </mrow>  </mrow>  </mrow>  <mo> ) </mo>  </mrow>  </mrow>  </mrow>  <annotation-xml encoding='MathML-Content'>  <apply>  <eq />  <apply>  <int />  <bvar>  <ci> z </ci>  </bvar>  <apply>  <times />  <apply>  <cosh />  <apply>  <plus />  <apply>  <times />  <ci> a </ci>  <apply>  <power />  <ci> z </ci>  <cn type='integer'> 2 </cn>  </apply>  </apply>  <ci> b </ci>  </apply>  </apply>  <apply>  <power />  <apply>  <power />  <ci> z </ci>  <cn type='integer'> 2 </cn>  </apply>  <cn type='integer'> -1 </cn>  </apply>  </apply>  </apply>  <apply>  <times />  <apply>  <times />  <cn type='integer'> 1 </cn>  <apply>  <power />  <apply>  <times />  <cn type='integer'> 2 </cn>  <ci> z </ci>  </apply>  <cn type='integer'> -1 </cn>  </apply>  </apply>  <apply>  <plus />  <apply>  <times />  <cn type='integer'> -2 </cn>  <apply>  <cosh />  <apply>  <plus />  <apply>  <times />  <ci> a </ci>  <apply>  <power />  <ci> z </ci>  <cn type='integer'> 2 </cn>  </apply>  </apply>  <ci> b </ci>  </apply>  </apply>  </apply>  <apply>  <times />  <apply>  <power />  <ci> a </ci>  <cn type='rational'> 1 <sep /> 2 </cn>  </apply>  <apply>  <power />  <pi />  <cn type='rational'> 1 <sep /> 2 </cn>  </apply>  <ci> z </ci>  <apply>  <ci> Erf </ci>  <apply>  <times />  <apply>  <power />  <ci> a </ci>  <cn type='rational'> 1 <sep /> 2 </cn>  </apply>  <ci> z </ci>  </apply>  </apply>  <apply>  <plus />  <apply>  <sinh />  <ci> b </ci>  </apply>  <apply>  <times />  <cn type='integer'> -1 </cn>  <apply>  <cosh />  <ci> b </ci>  </apply>  </apply>  </apply>  </apply>  <apply>  <times />  <apply>  <power />  <ci> a </ci>  <cn type='rational'> 1 <sep /> 2 </cn>  </apply>  <apply>  <power />  <pi />  <cn type='rational'> 1 <sep /> 2 </cn>  </apply>  <ci> z </ci>  <apply>  <ci> Erfi </ci>  <apply>  <times />  <apply>  <power />  <ci> a </ci>  <cn type='rational'> 1 <sep /> 2 </cn>  </apply>  <ci> z </ci>  </apply>  </apply>  <apply>  <plus />  <apply>  <cosh />  <ci> b </ci>  </apply>  <apply>  <sinh />  <ci> b </ci>  </apply>  </apply>  </apply>  </apply>  </apply>  </apply>  </annotation-xml>  </semantics>  </math> 
   
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  | Cell[BoxData[RowBox[List[RowBox[List["HoldPattern", "[", RowBox[List["\[Integral]", RowBox[List[FractionBox[RowBox[List["Cosh", "[", RowBox[List[RowBox[List["a_", " ", SuperscriptBox["z_", "2"]]], "+", "b_"]], "]"]], SuperscriptBox["z_", "2"]], RowBox[List["\[DifferentialD]", "z_"]]]]]], "]"]], "\[RuleDelayed]", FractionBox[RowBox[List[RowBox[List[RowBox[List["-", "2"]], " ", RowBox[List["Cosh", "[", RowBox[List["b", "+", RowBox[List["a", " ", SuperscriptBox["z", "2"]]]]], "]"]]]], "+", RowBox[List[SqrtBox["a"], " ", SqrtBox["\[Pi]"], " ", "z", " ", RowBox[List["Erf", "[", RowBox[List[SqrtBox["a"], " ", "z"]], "]"]], " ", RowBox[List["(", RowBox[List[RowBox[List["-", RowBox[List["Cosh", "[", "b", "]"]]]], "+", RowBox[List["Sinh", "[", "b", "]"]]]], ")"]]]], "+", RowBox[List[SqrtBox["a"], " ", SqrtBox["\[Pi]"], " ", "z", " ", RowBox[List["Erfi", "[", RowBox[List[SqrtBox["a"], " ", "z"]], "]"]], " ", RowBox[List["(", RowBox[List[RowBox[List["Cosh", "[", "b", "]"]], "+", RowBox[List["Sinh", "[", "b", "]"]]]], ")"]]]]]], RowBox[List["2", " ", "z"]]]]]]]  |  
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   Date Added to functions.wolfram.com (modification date)
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