calcule as potencias e raizes simplificando ao maximo a) (1/3)³ b) (2/5)² . (5/2) ⁻² c) (2/7)⁻³ d) (-2)⁻ ² e) (-3) -³ f) 2 -³ + 3 ² • (1/3) -¹ g) 3¹²/3¹⁷