Question

18 – { 6 – [ -3 – (5 – 4) – (7- 9)³ ] – 1 }

Answer 1

18 – { 6 – [ -3 – (5 – 4) – (7- 9)³ ] – 1 } =
18{5 -  [-3 + 1 + 8]} = 
18 - {5 - 6} =
18 + 1 =
19