Yes.Do we say that the set {11, 11, 6, 11} has only 2 elements

Here, there is a difference between notation and meaning, or syntax and semantics. The meaning of the string "{11, 11, 6, 11}" is an abstract object, set, with two elements. The particular syntactic conventions, such as using curly braces and separating elements with commas, do not exist at the level of meaning. Meanwhile, the concept "element" pertains to the meaning, the abstract mathematical object. So, the two-symbol string "11" that is repeated three times is an incident of notation only and is not directly related to the set as a mathematical object.What would we call the four symbols between the brackets if they're not elements (or members)?