Notebook[List[Cell[BoxData[FormBox[RowBox[List[RowBox[List["P", "(", "neg", ")"]], "=", RowBox[List[FractionBox[RowBox[List["erfc", "[", RowBox[List[RowBox[List["-", FractionBox["1", SqrtBox["2"]]]], RowBox[List["(", RowBox[List[FractionBox[SubscriptBox["v", "0"], "\[Sigma]"], "-", RowBox[List["C", " ", "\[Sigma]"]]]], ")"]]]], "]"]], RowBox[List["erfc", "[", RowBox[List[RowBox[List["-", FractionBox["1", SqrtBox["2"]]]], RowBox[List["(", FractionBox[SubscriptBox["v", "0"], "\[Sigma]"], ")"]]]], "]"]]], RowBox[List[SuperscriptBox["e", RowBox[List[RowBox[List["-", SubscriptBox["Cv", "0"]]], "+", RowBox[List[FractionBox["1", "2"], SuperscriptBox["\[Sigma]", "2"], SuperscriptBox["C", "2"]]]]]], "."]]]]]], TraditionalForm]], "Input"]]]