1.-(2ab)^3+3ab×a^2b^2 2.(x^2y^3)^4+(-x)^8(y^6)^2 3.(-3a^2)^3×a^3+(-4a)^2a^7-(5a^3)^3

1.-(2ab)^3+3ab×a^2b^2 =-8a^3b^3+3a^3b^3=-5a^3b^32.(x^2y^3)^4+(-x)^8(y^6)^2=x^8y^12+x^8y^12=2x^8y^12 3.(-3a^2)^3×a^3+(-4a)^2a^7-(5a^3)^3=-27a^9+16a^9-125a^9=-136a^94.(ab^2)^3-(ab)^3×b^3=a^3b^6-a^3b^...