Apply the property of negative integer exponents to rewrite 9^-23 as an expression with only positive exponents only

We can apply the property of negative integer exponents, which states that any non-zero number raised to a negative exponent is equal to the reciprocal of that number raised to the positive exponent.

Thus, we can rewrite 9^(-23) as 1/(9^(23)).
Therefore, the expression with only positive exponents is 1/(9^23).