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Simplify the expressions below.  

  1. for or

    Factor the numerator and denominator.

    After factoring, look for a Giant One to remove.

  2. for or

    Refer to part (a).

  3. for

    This is division with fractions. Here is a sample division problem with numbers.

    Step 1: Rewrite as multiplication by taking the reciprocal of the divisor.

    Step 2: Factor and use the Commutative Property to rewrite the problem so
    there are Giant Ones.

    Step 3: Remove the Giant Ones.

    Apply these steps to part (c).