(3x³y²)³÷(6x²y)²-三分之一(xy)³×(二分之一x²y)=27x^9y^6÷36x^4y^2-1/3x³y³x1/2x²y=3/4x^5y^4-1/6x^5y^4=7/12x^5y^4=7/12x(-4)^5x(-1/2)^4=-7/12x4x4^4x(1/2)...