化简:18x²-[6xy²-(xy²-12x²y³)]

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化简:18x²-[6xy²-(xy²-12x²y³)]化简:18x²-[6xy²-(xy²-12x²y

化简:18x²-[6xy²-(xy²-12x²y³)]
化简:18x²-[6xy²-(xy²-12x²y³)]

化简:18x²-[6xy²-(xy²-12x²y³)]
18x²-[6xy²-(xy²-12x²y³)]
=18x²-[6xy²-xy²+12x²y³)]
=18x²-5xy²-12x²y³