(-3x²y³）（x²-1）-（x²-1）×5x²y³

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(-3x²y³）（x²-1）-（x²-1）×5x²y³(-3x²y³）（x²-1）-（x²-1）×5

(-3x²y³）（x²-1）-（x²-1）×5x²y³
(-3x²y³）（x²-1）-（x²-1）×5x²y³

(-3x²y³）（x²-1）-（x²-1）×5x²y³
(-3x²y³）（x²-1）-（x²-1）×5x²y³=(x²-1)(-3x²y³-5x²y³)
=-8x²y³(x+1)(x-1)