先化简再求值4x^5y³÷{x^4y³÷[x³y÷（x³y²÷2xy²)]}=4x^5y³÷{x^4y³÷[x³y÷0.5x²]}=4x^5y³÷(x^4y³÷2xy)=4x^5y³÷0.5x³y²=8x²...