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Point Ponder (Posted on 2016-06-03) Difficulty: 1 of 5
Add precisely a single point and transform the relationship given below to an identity:
(7| + |)(7| - |) = 7|

No Solution Yet Submitted by K Sengupta    
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Regular idea Comment 2 of 2 |
Probably this is not the intended solution, but if we add the point at the end and interpret as a regular expression


But Ady's idea is better. Probably solution is

Edited on June 3, 2016, 5:37 pm
  Posted by armando on 2016-06-03 16:00:33

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