Type in expressions to have them evaluated.
Type :help for more information.

scala> (2)
res0: Int = 2

scala> (2 + 2)
res1: Int = 4

scala> ((2 + 2))
res2: Int = 4

scala> (((2 + 2)), ((2 + 2)))
res3: (Int, Int) = (4,4)

scala> (((2 + 2)), ((2 + 2)), 2)
res4: (Int, Int, Int) = (4,4,2)

scala> ((((2 + 2)), ((2 + 2)), 2).productIterator ++ Iterator(3) mkString)
res5: String = 4423

scala> 

scala> 55 ; ((2 + 2)) ; (1, 2, 3)
res6: (Int, Int, Int) = (1,2,3)

scala>