Answer:
1. Five a plus Five b
2. Quantity of x plus one raise to 2
3. Quantity of x plus 1 multiply by quantity of x minus 1
4. Two plus six minus quantity of x plus x
5.Two x plus six x minus quantity of x plus x.
6. Three multiply by quantity of x plus six y minus quantity of x minus three y
7. Two a plus b minus c minus quantity of a plus five b plus six c