Place a familiar mathematical symbol between 2 and 3 to express
a number greater than 2 and less than 3.
Watch out! There is more than one solution!
(In reply to re(3): The 3rd one
by Dej Mar)
I have hinted that there are more than the 3 solutions revealed so far.
Although the Unicode symbols are merges of a digit and a radical they may rightfully accepted as standard math symbols.
So one can consider your list of 6 items as an exhaustive solution
Just erase the redundant 3 in 33, - and that will be a happy ending.