**Adding or Subtracting Rational Expressions**

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**Step 1:- **If the denominators are the same, add or subtract the numerators.

Place the result over the common denominator.

If the denominators are different, first find the least common denominator. Write all rational expressions with this LCD, and then add or subtract the numerators. Place the result over the

common denominator.

**Step 2:-** Simplify. Write all answers in lowest terms.