(-3x^4y^2+2x^2y-1/4x^3y^2)/(-2x)^2

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(-3x^4y^2+2x^2y-1/4x^3y^2)/(-2x)^2(-3x^4y^2+2x^2y-1/4x^3y^2)/(-2x)^2(-3x^4y^2+2x^2y-1/4x^3y^2)/(-2x)

(-3x^4y^2+2x^2y-1/4x^3y^2)/(-2x)^2
(-3x^4y^2+2x^2y-1/4x^3y^2)/(-2x)^2

(-3x^4y^2+2x^2y-1/4x^3y^2)/(-2x)^2
原式=3/2x²y²-y+1/8xy²