(-2x^2)^5/(-x^3)^3+(2x)^4=(-32x^10)/(-x^9)=32x[5xy^2(x^2-3xy)-(-3x^2y^2)^3]/5(xy)^2=(5x^3y^2-15x^2y^3+27x^6y^6)/(5x^2y^2)=[5x^2y^2(x-3y+27/5x^4y^4)]/(5x^2y^2)=x-3y+27/5x^4y^4不好意思，第一题打错了，应该是（-2x^2)^5/(-x^3)^2+(2x)4（-2x^2)^5/(-x^3)^2+(2x)^4=(-32x^10)/(x^6)+8x^4=-32x^4+8x^4=-24x^4(2x)^4怎么就等于8x^4.....再怎么说也应该是16x^4吧...额，搞错了（-2x^2)^5/(-x^3)^2+(2x)^4=(-32x^10)/(x^6)+16x^4=-32x^4+16x^4=-16x^4