Notation doesn't apply just to the symbols in which you write but the meanings and operations assigned to them and the way in which they can be combined. This a

Notation doesn't apply just to the symbols in which you write but the meanings and operations assigned to them and the way in which they can be combined. This applies as much to the expressiveness of language semantics as it does to the language syntax. Consider how things like first class functions change the way one approaches a problem and expresses the solution.