3,1^2 + 2,9^2 = 9,61 + 8,41 = 18,02 (5,3 - (-4,7))^2 = 10^2 = 100 (1,37 + (-1,35))^3 = (1,37 - 1,35)^3 = 0,02^3 = 0, 000 008