19 Resolva as ex pressões numéricas a seguir. a) (-2)^4-(-3)^2 b) sqrt (16)+(-5)^0 c) -sqrt [3](-27)+(-6)^1div sqrt [4](81) d) -(54)^0+sqrt [3](-343)cdot (-1)^483 e) (-5)^3+sqrt [3](-8000)div (-4)^1 (-4)^3div (-2)^5-sqrt [7](-1)

a) $$(-2)^{4}-(-3)^{2} = 16 - 9 = 7$$

b) $$\sqrt{16} + (-5)^{0} = 4 + 1 = 5$$

c) $$-\sqrt[3]{-27} + (-6)^{1} \div \sqrt[4]{81} = 3 + (-6) \div 3 = 3 - 2 = 1$$

d) $$-(54)^{0} + \sqrt[3]{-343} \cdot (-1)^{483} = -1 + (-7) \cdot 1 = -1 - 7 = -8$$

e) $$(-5)^{3} + \sqrt[3]{-8000} \div (-4)^{1} = -125 + (-20) \div (-4) = -125 + 5 = -120$$

f) $$(-4)^{3} \div (-2)^{5} - \sqrt[7]{-1} = -64 \div -32 - (-1) = 2 + 1 = 3$$