计算3x²y×5/12xy²×(-4y/5x)(2)6x³y²÷(-y/x)×x/y²÷x²
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计算3x²y×5/12xy²×(-4y/5x)(2)6x³y²÷(-y/x)×x/y²÷x²
计算3x²y×5/12xy²×(-4y/5x)(2)6x³y²÷(-y/x)×x/y²÷x²
计算3x²y×5/12xy²×(-4y/5x)(2)6x³y²÷(-y/x)×x/y²÷x²
3x²y×5/12xy²×(-4y/5x)
=5x/4y×(-4y/5x)
=-1
6x³y²÷(-y/x)×x/y²÷x²
=-6x的4次方y x1/xy²
=-6x³/y
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算3x²y×5/12xy²×(-4y/5x)(2)6x³