1) -16a^5b + 8a^4b^3 + 6a^3b^3 - 10a^2b^42) 6x^3y^2 - 15x^4y^3 + 15x^5y - 9x^5y^23) -20a^2b^3c + 35a^3b^2c^2 - 15a^3b^2c
1) -16a^5b + 8a^4b^3 + 6a^3b^3 - 10a^2b^4
2) 6x^3y^2 - 15x^4y^3 + 15x^5y - 9x^5y^2
3) -20a^2b^3c + 35a^3b^2c^2 - 15a^3b^2c