Name: Anonymous 2012-09-22 12:08
$ racket
Welcome to Racket v5.1.3.3
(+)
0
$ racket
Welcome to Racket v5.1.3.3
(+)
0
(f g) = x f (g y) if f is a binary operator and g is a unary one. f =. +|
_10 f _20