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+
1. Function application and parentheses
(let ((two 2))
(+ three two)))
-Most of the parentheses in this construction *aren't* playing the role of applying a function to some arguments---only the ones in `(+ three two)` are doing that.
+ Most of the parentheses in this construction *aren't* playing the role of applying a function to some arguments---only the ones in `(+ three two)` are doing that.
In OCaml: