solve

7^(11/13)
would the answer be 7^-2 don't you subtract the Poweras or is it 2/7?

7^(11)*7^(1/13) is the way it's written. You don't subtract the powers in this expression. To subtract powers the expression would have to look like,

7^(11)/7^(13)=7^(11-13)=7^(-2).
Hope this helps