deletions | additions       diff --git a/textbf_Previous_href_https_www__.tex b/textbf_Previous_href_https_www__.tex  index c59eabd..113a5d3 100644  --- a/textbf_Previous_href_https_www__.tex  +++ b/textbf_Previous_href_https_www__.tex 
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\begin{equation}\label{eq:Drake_simplified}  N \approx \, \frac{1}{4}\, f_i \, L \,.   \end{equation}