Question

ok ya reenvio nuevamente

Answer 1

a)

-{-[(28÷7).(44÷4)]}

(+4).(11)

44 Rpta

b)

(-7+4)^4 ÷ 3^2 - √25 .(-2)

(-3)^4 ÷ 9 - 5(-2)

81 ÷ 9 - (-10)

9 + 10

19 Rpta