(-2x^2y^3)^2.(-3x^2y)^3除以(负二分之一x^5y^4)
=(-2x²y³)².(-3x²y)³÷(-½x^5y⁴)
=4x⁴y^6.(-27x^6y³)÷(-½x^5y⁴)
=-108x^10y^9÷(-½x^5y⁴)
=216x^5y^5