In Interlisp one would write a super parenthesis, which closes all open parentheses, upto an opening [ or the top ( : (a (b c (d ] and also (z (a [b c (d

In Interlisp one would write a super parenthesis, which closes all open parentheses, upto an opening [ or the top ( : (a (b c (d ] and also (z (a [b c (d] [e f (g]]