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4-13.

Simplify each of the expressions below. Express your answers as simply as possible. Homework Help ✎

Factor the polynomials, simplify, and then multiply.

Factor the polynomials, simplify, and then divide.

Two of the polynomials have common factors.

Both fractions already have a common denominator, so add the fractions and then simplify by factoring.

Both fractions have a common denominator, so subtract the fractions.