:: (c -> d) -> (a -> b -> c) -> a -> b -> d -package:pointless-fun -package:composition -is:exact

Compose composed with compose operator.
(f ... g) x y === f (g x y)
Multivariable composition.
f .: g ≡ (f .) . g ≡ \c d -> f (g c d)
Wrap the result of a function applied to 2 arguments.