(-2xy^2)^2·3x^2·y÷(-x^3y^4)

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(-2xy^2)^2·3x^2·y÷(-x^3y^4)
(-2xy^2)^2·3x^2·y÷(-x^3y^4)

(-2xy^2)^2·3x^2·y÷(-x^3y^4)
(-2xy^2)^2·3x^2·y÷(-x^3y^4)
=4x²y^4×3x²y÷(-x³y^4)
=12x^4y^5÷(-x³y^4)
=-12xy