1. 3ху^2

3. -2а^3

2.-5m^2n

4. 12b^4

5. z^4x^2y

6. pn^3q^3

7. -2/3*n*m^3

8. -3/4*a^3*b

3. 1 - 15ab^2

2 - 8a^3b

3 - 15a^2b^2

4 - 8a^3b^2

5 - 15a^3b^2

6 - 8a^3b^3

7 - 15a^4b^2

8 - 8a^3b^4