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May 21, 2014 at 12:12 vote accept Val
May 21, 2014 at 12:12 comment added Val Ok. I just do not notice the ambiguity perhaps because I have the expressions represented by trees in memory and wrapped em with "(" expr ")" parethises when write them out on the screen.
May 21, 2014 at 11:50 history answered Roi Divon CC BY-SA 3.0