Prelude> ((++) [1,2] [3,4])
[1,2,3,4]
Prelude> ((:) 1 [2,3])
[1,2,3]
Prelude> ((head) [1,2,3,4])
1
Prelude> ((tail) [1,2,3,4])
[2,3,4]
Prelude> import Data.List
Prelude Data.List> ((\\) [1,2,3,4] [1,4])
[2,3]
Prelude Data.List>