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原式=[-4x(2xy+3xy²;)+12(x²;y)²;y³;]÷(-6xy)=[-4x×2xy-4x×3xy²;+12×(x²;)²;×y²;×y³;]÷(-6xy)=(-8x²;y-12x²;y²;+12x^4y^5)÷(-6xy)=-8x²;y÷(-6xy)-12x…
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