（x^2y)^5/(x^2y)^2等于?
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（x^2y)^5/(x^2y)^2等于?（x^2y)^5/(x^2y)^2等于?（x^2y)^5/(x^2y)^2等于?x^(10y)/x^(4y)=x^(6y)
（x^2y)^5/(x^2y)^2等于?
（x^2y)^5/(x^2y)^2等于?
（x^2y)^5/(x^2y)^2等于?
x^(10y)/x^(4y)=x^(6y)
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