Yes, <$> is the general `map` (`fmap`)

  <*> 

takes function(s) out of a mappable and applies it (them) to argument(s) within a mappable.

  (+) <$> [1,2,3] = [add 1, add 2, add 3]

  (+) <$> [1,2,3] <*> [10, 20] = [(1 +), (2 +), (3 +)] <*> [10, 20] = [11, 21, 12, 22, 13, 23]

  (+) <$> Just 3 <*> Just 5 = Just (3 + ) <*> Just 5 = Just 8

  (+) <$> readLn <*> readLn = ... 

well that depends on the inputs :)