deletions | additions       diff --git a/untitled.tex b/untitled.tex  index 6e04c11..4a5bf7e 100644  --- a/untitled.tex  +++ b/untitled.tex 
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So  $+2 \cdot |2=-2$ \\  So then what about $\frac{+|}{-}=*$ $\frac{+|}{-}=*=\frac{+-}{|}=\frac{-|}{+}$