Answer:
-161
Explanation:
so parentheses are going to be your friend because they tell you what order to do things in so first you're going to replace all the the variables with what it says it equals and make sure to put it in parentheses where the variables were and since the A and B were connected by multiplication you're going to put a bigger parentheses around those two so then you just take it step by step starting with the seven on the right so -7 * -7 is 49 so you just bring them down and put the minus in front of it then on to the next one just the four squared 4 * 4 is 16 so you bring that down and then you bring the -7 down and those are still on those outside parentheses so then you do 16 * -7 which equals -112 then you just subtract that by 49 and then you've got -161