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Comment by Jtsummers | Hacker News Reader

Not quite. + isn’t the last thing done (which it would be in Polish notation). Instead it’s done during the / operation.

Polish notation would be lisp (or the notion most people have for lisp, special forms and macros break it up a bit).

Lisp is polish notation for trees of variable arity. hence all the parens - you need some way to group them.

So in some K flavoured LISP I think it would be

    ((/ +) (! 100))

Or in clojure with the threading macro

    (->> 100 range (reduce +))

which is equivalent to this, without the macro

    (reduce + (range 100))

yes, quite a bit more long winded than K