New answers tagged formatting
Among the spreadsheet applications I have used so far, current Apple Numbers has the nicest inline formula editor. It goes beyond mere color-coding. Note how there are no literal parentheses in the screenshot. Traditional math typesetting (e.g. TeX) increases the size of outer brackets sometimes, which can help with deep nesting, but when editing it is ...
I have just recently designed an UI for stripping regular expressions manually, maybe it can help or give you an idea.
What about a tree diagram? Here's an example from Predicate Logic that may be applicable: The end nodes in this case are constants, but in your case should be replaces with expressions. Also, PL has more operators. This is definitely more graspable that just inline bracketed notation. However, editing will probably have to be inline. Consider how ...
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