Given the following:
[tex]\text{ (}\frac{2}{3},\infty)[/tex]Since both ends are in parenthesis ( ), therefore, it means that it is not equal to.
Writing this will be:
[tex]\text{ (}\frac{2}{3},\infty)\text{ = }\frac{2}{3}\text{ }<\text{ x }<\text{ }\infty[/tex]