Use the curry function (from Prelude or Data.Tuple) to convert a function that takes tuples to a function that takes two arguments.
curry fst 1 2 -- computes 1
curry snd 1 2 -- computes 2
curry (uncurry f) -- computes the same as f
import Data.Tuple (swap)
curry swap 1 2 -- computes (2, 1)