Resposta:

a) 4² + 2³ + 7¹ = 4x4 + 2x2x2 + 7 = 16 + 8 + 7 = 31

b) 6⁴ : 6² - 3² = 6x6x6x6 / 6x6 - 3x3 = 6x6 - 9 = 36 - 9 = 27

c) 10³ - 8² · 2 = 10x10x10 - 8x8 · 2 = 1000 - 64 · 2 = 1000 - 128 = 872

d) (4²)⁻¹ · 6⁻² = (4x4)⁻¹ · 1/6² = 16⁻¹ · 1/(6x6) = 1/16 · 1/36 = 1/576