计算:2/4-x+12/x^2-16+2/x+4通分:(1)-7/24x^2y^5 ,5/18x^3y^4(2)n/m^2-3mn ,m/3n^2-mn(3)3/x^2+x ,2x/x^2-1 ,5/x^2-x计算:(1)z/3x^2y - y/2x^2z + x/6y^2z^2(2)18/m^2-9 + 3/3-m(3)1/x+1 - x+3/x^2-1 除以x^2-9/x^2-2x+1(4)(x+3/x-3 + 9/x^2-6x+9)* x-3/x

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计算:2/4-x+12/x^2-16+2/x+4通分:(1)-7/24x^2y^5 ,5/18x^3y^4(2)n/m^2-3mn ,m/3n^2-mn(3)3/x^2+x ,2x/x^2-1 ,5/x^2-x计算:(1)z/3x^2y - y/2x^2z + x/6y^2z^2(2)18/m^2-9 + 3/3-m(3)1/x+1 - x+3/x^2-1 除以x^2-9/x^2-2x+1(4)(x+3/x-3 + 9/x^2-6x+9)* x-3/x
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计算:2/4-x+12/x^2-16+2/x+4通分:(1)-7/24x^2y^5 ,5/18x^3y^4(2)n/m^2-3mn ,m/3n^2-mn(3)3/x^2+x ,2x/x^2-1 ,5/x^2-x计算:(1)z/3x^2y - y/2x^2z + x/6y^2z^2(2)18/m^2-9 + 3/3-m(3)1/x+1 - x+3/x^2-1 除以x^2-9/x^2-2x+1(4)(x+3/x-3 + 9/x^2-6x+9)* x-3/x
计算:2/4-x+12/x^2-16+2/x+4
通分:(1)-7/24x^2y^5 ,5/18x^3y^4
(2)n/m^2-3mn ,m/3n^2-mn
(3)3/x^2+x ,2x/x^2-1 ,5/x^2-x
计算:
(1)z/3x^2y - y/2x^2z + x/6y^2z^2
(2)18/m^2-9 + 3/3-m
(3)1/x+1 - x+3/x^2-1 除以x^2-9/x^2-2x+1
(4)(x+3/x-3 + 9/x^2-6x+9)* x-3/x
这些题目对我来说已经不必要了
你们随便回答个什么都没关系
只要别打个“麻烦你把题目打清楚点”就行了拉

计算:2/4-x+12/x^2-16+2/x+4通分:(1)-7/24x^2y^5 ,5/18x^3y^4(2)n/m^2-3mn ,m/3n^2-mn(3)3/x^2+x ,2x/x^2-1 ,5/x^2-x计算:(1)z/3x^2y - y/2x^2z + x/6y^2z^2(2)18/m^2-9 + 3/3-m(3)1/x+1 - x+3/x^2-1 除以x^2-9/x^2-2x+1(4)(x+3/x-3 + 9/x^2-6x+9)* x-3/x
麻烦你把题目打清楚点