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Simplify each expression.

  1. Recall that when you divide a number by itself, the quotient is . Can you find any factors that are in both the numerator and the denominator?

    You can rewrite the expression.

    There are three 's on the top and on the bottom, which may be removed by division. Similarly, there are 's and 's that can be removed.

  2. Rewrite the expression and simplify.

  3. You can rewrite this expression as:

  4. See (a).