Final answer:
To simplify the expression x^8 * x^7 * x^-2, combine the exponents by adding them.
Step-by-step explanation:
To simplify the expression x8 * x7 * x-2, we can use the rule of multiplying variables with the same base by adding their exponents. In this case, the base is x. So the simplified expression is x8+7-2. Combining the exponents, we have x13. Therefore, the simplified expression is x13.