1.(-y分之a的平方x)的立方除以(ay分之x)的平方(xy分之负a)的四次方=-a^6x^3/y^3/[x^2/(a^2y^2)*a^4/(x^4y^4)]=-a^6x^3/y^3/[a^2/(x^2y^6)]=-a^6x^3/y^3*x^2y^6/a^2=-a^4x^5y^32.(x+y分之y-x)的平方除以y+x分之(x-y)...