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 Sinh

 http://functions.wolfram.com/01.19.06.0006.01

 Input Form

 Sinh[z]^2 == Sum[(2^(2 k - 1) z^(2 k))/(2 k)!, {k, 1, Infinity}]

 Standard Form

 Cell[BoxData[RowBox[List[SuperscriptBox[RowBox[List["Sinh", "[", "z", "]"]], "2"], "\[Equal]", RowBox[List[UnderoverscriptBox["\[Sum]", RowBox[List["k", "=", "1"]], "\[Infinity]"], FractionBox[RowBox[List[" ", RowBox[List[SuperscriptBox["2", RowBox[List[RowBox[List["2", " ", "k"]], "-", "1"]]], " ", SuperscriptBox["z", RowBox[List["2", " ", "k"]]]]]]], RowBox[List[RowBox[List["(", RowBox[List["2", " ", "k"]], ")"]], "!"]]]]]]]]]

 MathML Form

 sinh 2 ( z ) k = 1 2 2 k - 1 z 2 k ( 2 k ) ! z 2 k 1 2 2 k -1 z 2 k 2 k -1 [/itex]

 Rule Form

 Cell[BoxData[RowBox[List[RowBox[List["HoldPattern", "[", SuperscriptBox[RowBox[List["Sinh", "[", "z_", "]"]], "2"], "]"]], "\[RuleDelayed]", RowBox[List[UnderoverscriptBox["\[Sum]", RowBox[List["k", "=", "1"]], "\[Infinity]"], FractionBox[RowBox[List[SuperscriptBox["2", RowBox[List[RowBox[List["2", " ", "k"]], "-", "1"]]], " ", SuperscriptBox["z", RowBox[List["2", " ", "k"]]]]], RowBox[List[RowBox[List["(", RowBox[List["2", " ", "k"]], ")"]], "!"]]]]]]]]]

 Date Added to functions.wolfram.com (modification date)

 2001-10-29