deletions | additions       diff --git a/Box.tex b/Box.tex  index 659228d..464c870 100644  --- a/Box.tex  +++ b/Box.tex 
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$N =\overbrace{R}^{=10} =\overbrace{R}^{\sim10}  \times f_p \overbrace{f_p}^{\sim 1}  \times n_e \overbrace{n_e}^{\sim 0.2}  \times f_l \times f_i \times f_c \times L$