👉 In mathematics, a superfluous element is an element in a set that can be added to or subtracted from another element without changing their value. For example, consider the set of integers {1, 2, 3, 4}. If we add 5 to this set, we get {1, 2, 6, 7}, which is not equal to the original set. Similarly, if we subtract 5 from this set, we also get a different result
