Answer:
-78
Step-by-step explanation:
So we start with the innermost parentheses
(5+4) = 9
{1−[−3−(9)]} x -6
-3 - 9 = -12
{1 - [-12]}
Whenever you subtract a negative, the subtraction and negative cancel each other out, so it turns into addition
1 + 12 = 13
13 x -6 = -78
