deletions | additions       diff --git a/Interesting.tex b/Interesting.tex  index b21d9e3..021588a 100644  --- a/Interesting.tex  +++ b/Interesting.tex 
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[a,b+x,c]=[a,b,c]+[a,x,c]  \end{equation}  For expansions such as \begin{equation}  [a,bx,c]=b[a,x,c]+[a,b,c]x  \end{equation}  to be true, then there must exist the identity \begin{equation}  abcx+baxc-bcax-abxc=0  \end{equation}