(Dont copy)
explain please
In Haskell:
The expression Branch (Tip 1) (Tip 2) is a value of the datatype:
1) data Tree = Tip Int | Branch
2) data Tree = Tip Tree | Branch Int Int
3) data Tree = Tip Tree | Branch Tree Tree data Tree = Tip Int | Branch Int Int
4) data Tree = Tip Int | Branch Tree Tree
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