This Instructional Activity is a part of the Lesson 1, Unit 1, Grade 8. Work through Examples 1-5 as a group, and supplement with additional examples if needed. Notice the use of parentheses in Examples 2, 3, and 4. In cases where the base is either fractional or negative, parentheses tell us what part of the expression is included in the base and, therefore, going to be multiplied repeatedly.