(2 - 1 / 2)² + 3 / 18÷4 / 6 - (1 / 4 - 1) = 13 / 4( - 3 / 2×4 / 7×5 / 6 + 2 / 14)×7 / 2 + ( - 3 / 2)² - 1 = - 3 / 414 / 49 + 8 / 28 - 24 / 42 + 16 / 56 = 2 / 712 / 21×14 / 6 - ( - 1 / 3)² + 15 / 27÷25?
(2 - 1 / 2)² + 3 / 18÷4 / 6 - (1 / 4 - 1) = 13 / 4 ( - 3 / 2×4 / 7×5 / 6 + 2 / 14)×7 / 2 + ( - 3 / 2)² - 1 = - 3 / 4 14 / 49 + 8 / 28 - 24 / 42 + 16 / 56 = 2 / 7 12 / 21×14 / 6 - ( - 1 / 3)² + 15 / 27÷25 / 15 = 14 / 9 (1 - 3 / 2)² - 2 - 1 / 4 + 13 / 14×28 / 26 = - 1.