Answer:
10x sqaured -7
Explanation:
First circle the numbers that are in common. For example "7x sqaured" and "3x sqaured" are in common. Now add those together. 7 plus 3 is 10, so it would be 10x sqaured. Now circle the others in common which are -8 and 1, add them together and you get -7. Boom that is your simplified answer.