分式方程的解为___________.
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计算:=___________.
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若分式有意义,则x的取值范围是___________.
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若1厘米=10000微米,则2微米=________厘米.
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分解因式:a2+5a﹣6= .
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计算:(m6n3-6mn5)÷(-3mn3)=___________.
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计算:(a-1)(b+2)=___________.
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计算:-y2·(-y)3=__________.
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计算:(2x2-x)-(x2-2x)=________.
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如果单项式3xn-1y4与x3ym是同类项,那么n-m的值是________.
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