deletions | additions       diff --git a/The 21 thing.tex b/The 21 thing.tex  index 941b29b..7b06651 100644  --- a/The 21 thing.tex  +++ b/The 21 thing.tex 
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\sum_{n=1}^{\infty} \frac{ (d_1d_2;;f)^n }{ (d_1d_2;;g) ^n} = \frac{1}{10^{2f-1}}\frac{1|(01;;f-1)}{(10;;g-f)}  \end{equation \end{equation}