PLEASE HELP ASAP!!! DUE SOON!!! I'll MARK BRAINLIEST FOR RIGHT ANSER!!!
In exercises 1-8, find the degree of the monomial.
1. -6s
2. w
3. 8
4. -2abc
5. 7x^2y
6. 4r^2s^3t
7. 10mn^3
8. 2/3

In exercises 9-12, write the polynomial in standard form. Identify the degree and leading coefficient of the polynomial. Then classify the polynomial by the number of terms.
9. x + 3x^2 + 5
10. √5y
11. 3x^5 + 6x^8
12. f^2 - 2f + f^4

In exercises 13-16, find the sum.
13. (-4x + 9) + (6x - 14)
14. (-3a - 2) + (7a + 5)
15. (x^2 + 3x + 5) + (-x^2 + 6x - 4)
16. (t^2 + 3t^3 - 3) + (2t^2 + 7t - 2t^3)

In exercises 17-20, find the difference.
17. (g - 4) - (3g - 6)
18. (-5h -2) - (7h + 6)
19. (-x^2 - 5) - (-3x^2 - x - 8)
20. (k^2 + 6k^3 - 4) - (5k^3 + 7k - 3k^2)