Hmm, how do you store the expressions? If you store them as a tree, you already have the information necessary, because you can always generate parenthesis for an <+|->-Node with to children on the fly - that's what I meant with showing relevant code - do you store the expression as a tree - otherwise this is a useless info on my part *g*?
An intellectual is someone whose mind watches itself.
-- Albert Camus
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