4x^5y³÷[x^4y³÷[x³y÷(x³y²÷2xy²]}
=4x^5y³÷[x^4y³÷[x³y÷2x²]}
=4x^5y^3÷(x^4y³÷2xy)
=4x^5y^3÷2x^3y^2
=2x²y
=2x(-1/2)²x3
=3/2