$$
\underset{\text{不同经营业态}}{\left\{\begin{array}{c}
F_1=82.436 \\
F_2=45.715 \\
F_3=534.35 \\
F_4=93.061 \\
F_5=46.328 \\
F_6=20.380 \\
F_7=1.2494 \\
\end{array}\right.}
\underset{\text{市场类型}}{\left\{\begin{array}{c}
F_8=602.636\\
F_9=221.062
\end{array}\right.}
\underset{\text{终端类型}}{\left\{\begin{array}{c}
F_{10}=344.823\\
F_{11}=450.599
\end{array} \right.}
$$编译显示Paragraph ended before binrel@ was complete.
Missing $ inserted.
Display math should end with $$.
$$
\underset{\text{不同经营业态}}{\left\{\begin{array}{c}
F_1=82.436 \\
F_2=45.715 \\
F_3=534.35 \\
F_4=93.061 \\
F_5=46.328 \\
F_6=20.380 \\
F_7=1.2494 \\
\end{array}\right.}
\underset{\text{市场类型}}{\left\{\begin{array}{c}
F_8=602.636\\
F_9=221.062
\end{array}\right.}
\underset{\text{终端类型}}{\left\{\begin{array}{c}
F_{10}=344.823\\
F_{11}=450.599
\end{array} \right.}
$$运行起来没问题
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