Simplify the expression. Write the result using positive exponents only. See Examples 8 through 13.
Example 8. Simplify by writing the expression with positive exponents only.
Example 9. Simplify by writing the expression with positive exponents only.
Example 10. Simplify by writing the expression with positive exponents only.
Example 11. Simplify the expression. Write the result using positive exponents only.
Example 12. Simplify the expression. Write the result using positive exponents only.
Example 13. Simplify the expression. Write the result using positive exponents only.
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