Answer:
1) Five times the sum of a number and seven belongs to: 5(n+7)
2) Eight more than the product of seven and a number decreased by two belongs to: 8+7n-2
3) Twice the difference of eight and a number belongs to: 2(8-n)
4) Five less than the quotient of eight and a number increased by seven belongs to: 8/n -5+7
