PEMDAS
Parenthesis
Exponentials
Multiplication/Division
Addition/Subtraction
so first we handle (32 - 8) because that it in the innermost parenthesis
32 - 8 = 24
so we have
6 * [24 / 4 + 2]
then we do the stuff in the next set of parenthesis
[24 / 4 + 2]
inside here, we do division first
24 / 4 = 6
so we get
[6 + 2] = 8
then
6 * [8] = 48
therefore the value of your expression is 48