1. The problem is to simplify an expression and write it using only positive exponents. 2. The general rule is that any negative exponent $a^{-n}$ can be rewritten as $\frac{1}{a^n}$. 3. To simplify, identify terms with negative exponents and rewrite them as fractions. 4. Multiply or divide terms as needed, combining like bases by adding or subtracting exponents. 5. Ensure the final expression has only positive exponents by moving terms with negative exponents to the denominator. 6. Without the specific expression, this is the general method to simplify to positive exponents.