**Answer:**

5. (n²-7) = 5

6. (n²-n³) = 18

7. ³√n = 3-n²

8. 2n+5

9. (n-4) (n+4)

10. (n-3)² =35

11. 10(n-7)

12. 4n²

13.8 – 2/3n

14. (n+5)²

15. x-5

**Answer:**

5. (n²-7) = 5

6. (n²-n³) = 18

7. ³√n = 3-n²

8. 2n+5

9. (n-4) (n+4)

10. (n-3)² =35

11. 10(n-7)

12. 4n²

13.8 – 2/3n

14. (n+5)²

15. x-5