For this, we will use roster notation.
We know that x has to be an integer, which is any number not a fraction. We also know that x is greater than 3, but not equal to it, therefore 3 will not be included. Our set will start with 4.
Since there are many, many integers greater than 3, we only have to list the first 5 and then add "..." to show the pattern continues.
W = {4, 5, 6, 7, 8, ...}