[(12 + 8) (7 2) + 3] 4
First, calculate inside the parentheses:
12 + 8 = 20
7 2 = 5
Thus, (12 + 8) (7 2) = 20 5 = 4
Then, adding the 3 gives (12 + 8) (7 2) + 3 = 4 + 3 = 7
Now that we've solved what’s inside the square brackets, we multiply by 4, which yields: