Question

7 times the sum of a squared and b minus 4 times the sum of a squared and b

Answer 1

7(a^2+b)-4(a^2+b)
7(a^2)+7b-4(a^2)-4b
7a^2-4a^2+7b-4b
(7-4)a^2+(7-4)b
3a^2+3b