Answer:
1. x-15
2.

3. 4y
4. z+7
5. eight groups of p
6. the sum of s+7
7. 8(8)+3 = 67
8. 3(7+4)= 33
9. (4)-5(-1)+
=> 4+5+16 = 25
10. (-7)-
= -7 -9= -16
11.
(8)(4+6) =>
(8)(10) = 40
12. No, 7+7x ≠7x +1
13. Yes, 2.5(3+x) = 2.5x + 7.5 => 7.5+ 2.5x = 2.5x + 7.5
14.
-2m-5
15. 13x-24
16.

17. 14p+7
Explanation:
this took a while.