s-expressions only give you a data format - just like XMl, JSON, ... One then maps a programming language to s-expressions. You could easily map a complex inf

s-expressions only give you a data format - just like XMl, JSON, ... One then maps a programming language to s-expressions. You could easily map a complex infix/mixfix language to s-expressions. This is a valid s-expression: (foo = x ^ 3 * 4 / sin x) You can imagine variants with more parenthesis, too.