Sstrhsrtj

begin{equation*}

    A = frac{%

        begin{tikzpicture}

            draw (0,0) to[bend left] (1,0) to[bend left] (0,0);

        end{tikzpicture}

    }{%

        begin{tikzpicture}

            defL{1.0} 

            matrix[column sep=.1cm, row sep=2mm]

            {   

                draw (0,0) to[bend left] (L,0) to[bend left] (0,0);

                & 

                draw[dashed] (0,0) -- (L,0);

                draw[xshift=L cm] (0,0) to[bend left] (L,0) to[bend left] (0,0); \

            };

        end{tikzpicture}

    }

end{equation*}

begin{equation*}

    A = frac{%

        begin{tikzpicture}

            draw (0,0) to[bend left] (1,0) to[bend left] (0,0);

        end{tikzpicture}

    }{%

        begin{tikzpicture}

            defL{1.0} 

            matrix[column sep=.1cm, row sep=2mm]

            {   

                draw (0,0) to[bend left] (L,0) to[bend left] (0,0);

                & 

                draw[dashed] (0,0) -- (L,0);

                draw[xshift=L cm] (0,0) to[bend left] (L,0) to[bend left] (0,0); \

            };

        end{tikzpicture}

    }

end{equation*}

begin{equation*}

    A = frac{%

        begin{tikzpicture}

            draw (0,0) to[bend left] (1,0) to[bend left] (0,0);

        end{tikzpicture}

    }{%

        begin{tikzpicture}

            defL{1.0} 

            matrix[column sep=.1cm, row sep=2mm]

            {   

                draw (0,0) to[bend left] (L,0) to[bend left] (0,0);

                & 

                draw[dashed] (0,0) -- (L,0);

                draw[xshift=L cm] (0,0) to[bend left] (L,0) to[bend left] (0,0); \

            };

        end{tikzpicture}

    }

end{equation*}

begin{equation*}

    A = frac{%

        begin{tikzpicture}

            draw (0,0) to[bend left] (1,0) to[bend left] (0,0);

        end{tikzpicture}

    }{%

        begin{tikzpicture}

            defL{1.0} 

            matrix[column sep=.1cm, row sep=2mm]

            {   

                draw (0,0) to[bend left] (L,0) to[bend left] (0,0);

                & 

                draw[dashed] (0,0) -- (L,0);

                draw[xshift=L cm] (0,0) to[bend left] (L,0) to[bend left] (0,0); \

            };

        end{tikzpicture}

    }

end{equation*}

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