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   http://functions.wolfram.com/01.10.03.0110.01
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    Csc[(17 Pi)/12] == Root[16 - 16 #1^2 + #1^4 & , 2] 
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   Cell[BoxData[RowBox[List[RowBox[List["Csc", "[", FractionBox[RowBox[List["17", " ", "\[Pi]"]], "12"], "]"]], "\[Equal]", RowBox[List["Root", "[", RowBox[List[RowBox[List[RowBox[List["16", "-", RowBox[List["16", " ", SuperscriptBox["#1", "2"]]], "+", SuperscriptBox["#1", "4"]]], "&"]], ",", "2"]], "]"]]]]]] 
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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>  <mi> csc </mi>  <mo> ⁡ </mo>  <mo> ( </mo>  <mfrac>  <mrow>  <mn> 17 </mn>  <mo> ⁢ </mo>  <mi> π </mi>  </mrow>  <mn> 12 </mn>  </mfrac>  <mo> ) </mo>  </mrow>  <mo> ⩵ </mo>  <msubsup>  <mrow>  <mo> ( </mo>  <mrow>  <mi> z </mi>  <mo> ; </mo>  <mrow>  <msup>  <mi> z </mi>  <mn> 4 </mn>  </msup>  <mo> - </mo>  <mrow>  <mn> 16 </mn>  <mo> ⁢ </mo>  <msup>  <mi> z </mi>  <mn> 2 </mn>  </msup>  </mrow>  <mo> + </mo>  <mn> 16 </mn>  </mrow>  </mrow>  <mo> ) </mo>  </mrow>  <mn> 2 </mn>  <mrow>  <mo> - </mo>  <mn> 1 </mn>  </mrow>  </msubsup>  </mrow>  <annotation-xml encoding='MathML-Content'>  <apply>  <eq />  <apply>  <csc />  <apply>  <times />  <cn type='integer'> 17 </cn>  <pi />  <apply>  <power />  <cn type='integer'> 12 </cn>  <cn type='integer'> -1 </cn>  </apply>  </apply>  </apply>  <apply>  <power />  <apply>  <ci> Subscript </ci>  <apply>  <ci> CompoundExpression </ci>  <ci> z </ci>  <apply>  <plus />  <apply>  <power />  <ci> z </ci>  <cn type='integer'> 4 </cn>  </apply>  <apply>  <times />  <cn type='integer'> -1 </cn>  <apply>  <times />  <cn type='integer'> 16 </cn>  <apply>  <power />  <ci> z </ci>  <cn type='integer'> 2 </cn>  </apply>  </apply>  </apply>  <cn type='integer'> 16 </cn>  </apply>  </apply>  <cn type='integer'> 2 </cn>  </apply>  <cn type='integer'> -1 </cn>  </apply>  </apply>  </annotation-xml>  </semantics>  </math> 
   
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  | Cell[BoxData[RowBox[List[RowBox[List["HoldPattern", "[", RowBox[List["Csc", "[", FractionBox[RowBox[List["17", " ", "\[Pi]"]], "12"], "]"]], "]"]], "\[RuleDelayed]", RowBox[List["Root", "[", RowBox[List[RowBox[List[RowBox[List["16", "-", RowBox[List["16", " ", SuperscriptBox["#1", "2"]]], "+", SuperscriptBox["#1", "4"]]], "&"]], ",", "2"]], "]"]]]]]]  |  
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   Date Added to functions.wolfram.com (modification date)
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