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 Binomial

 http://functions.wolfram.com/06.03.03.0006.01

 Input Form

 Binomial[n, 4] == ((n - 3) (n - 2) (n - 1) n)/24

 Standard Form

 Cell[BoxData[RowBox[List[RowBox[List["Binomial", "[", RowBox[List["n", ",", "4"]], "]"]], "\[Equal]", FractionBox[RowBox[List[RowBox[List["(", RowBox[List["n", "-", "3"]], ")"]], RowBox[List["(", RowBox[List["n", "-", "2"]], ")"]], RowBox[List["(", RowBox[List["n", "-", "1"]], ")"]], "n"]], "24"], " "]]]]

 MathML Form

 ( n 4 ) TagBox[RowBox[List["(", GridBox[List[List[TagBox["n", Identity, Rule[Editable, True]]], List[TagBox["4", Identity, Rule[Editable, True]]]]], ")"]], InterpretTemplate[Function[Binomial[Slot[1], Slot[2]]]], Rule[Editable, False]] ( n - 3 ) ( n - 2 ) ( n - 1 ) n 24 Binomial n 4 n -3 n -2 n -1 n 24 -1 [/itex]

 Rule Form

 Cell[BoxData[RowBox[List[RowBox[List["HoldPattern", "[", RowBox[List["Binomial", "[", RowBox[List["n_", ",", "4"]], "]"]], "]"]], "\[RuleDelayed]", RowBox[List[FractionBox["1", "24"], " ", RowBox[List["(", RowBox[List["n", "-", "3"]], ")"]], " ", RowBox[List["(", RowBox[List["n", "-", "2"]], ")"]], " ", RowBox[List["(", RowBox[List["n", "-", "1"]], ")"]], " ", "n"]]]]]]

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

 2001-10-29