let's look through the options one by one:
A. 15+(83-6)
inside the parentheses, we multiply first
15+(24-6)
now simplify the rest of the parentheses
15+18
33
so answer "A'' equals 33
B. (30+6)/6+32^2
we simplify the inside of the parentheses
36/6+32^2
we simplify the exponent
36/6+34
6+12
18
So NO, answer "B" is not correct
C. 40-[5(3+1)+8]
all the way on the inside of the parentheses,
40-[54+8]
multiplying comes before adding, so
40-[20+8]
inside the brackets,
40-28
12
So answer "C" is also incorrect
D. [(3+5)2-5]3
inside the parentheses
[82-5]3
multiplying before subtracting
[16-5]3
113
33
So the only answers that equal 33 are answer "A" and answer "D" equal 33
