Sharina simplified the expression 3(2x – 6 – x 1)^2 – 2 4x. in step 1 she simplified within the parentheses. in step 2 she expanded the exponent. which is a possible next step? a. simplify the expression by adding and subtracting from left to right. b. combine like terms within the parentheses. c. combine all x-terms. d. distribute the 3 to each term in the parentheses by multiplying.