Pls help!!!!! Thx and fast sry for rushing!!

the answer is 399 just go to socratic if you need help with math.
The answer is 399
PEMDAS
First is parenthesis, 20 - 8 = 12
Then exponents, 4^3 = 64
Since the 12 is still in parenthesis, you multiply it by the 64 and you get 768.
Moving onto the D in PEMDAS, you have to divide the 768 by 2 and you get 384.
And finally, addition. 384 + 6 = 390 and 390 + 9 = 399.