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   Cell[BoxData[RowBox[List[RowBox[List["CatalanNumber", "[", "4", "]"]], "\[Equal]", "14"]]]] 
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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>  <msub>  <semantics>  <mi> C </mi>  <annotation encoding='Mathematica'> TagBox["C", CatalanNumber] </annotation>  </semantics>  <mn> 4 </mn>  </msub>  <mo>  </mo>  <mn> 14 </mn>  </mrow>  <annotation-xml encoding='MathML-Content'>  <apply>  <eq />  <apply>  <ci> CatalanNumber </ci>  <cn type='integer'> 4 </cn>  </apply>  <cn type='integer'> 14 </cn>  </apply>  </annotation-xml>  </semantics>  </math> 
   
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  | Cell[BoxData[RowBox[List[RowBox[List["HoldPattern", "[", RowBox[List["CatalanNumber", "[", "4", "]"]], "]"]], "\[RuleDelayed]", "14"]]]]  |  
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