Simplify Expressions Worksheets [PDF] (7.EE.A.1): 7th Grade Math Grade 7 Expressions, Equations, And Inequalities 7.EE.A.1 Teaching Simplifies Expression Easily. Firstly, Solve the parentheses by adding or subtracting like terms (if any). For example, 3x (x + y) = 3x.x + 3xy. Secondly, use the exponent rules to simplify the like terms. Now, add or subtract the like terms.