（3a^3/X+Y)^3*(X^2-Y^2)除以（Y-X/Y+X)^2
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（3a^3/X+Y)^3*(X^2-Y^2)除以（Y-X/Y+X)^2（3a^3/X+Y)^3*(X^2-Y^2)除以（Y-X/Y+X)^2（3a^3/X+Y)^3*(X^2-Y^2)除以（Y-X/Y
（3a^3/X+Y)^3*(X^2-Y^2)除以（Y-X/Y+X)^2
（3a^3/X+Y)^3*(X^2-Y^2)除以（Y-X/Y+X)^2
（3a^3/X+Y)^3*(X^2-Y^2)除以（Y-X/Y+X)^2
（3a^3/X+Y)^3*(X^2-Y^2)除以（Y-X/Y+X)^2
=27a^9/(x+y)^3*(x-y)(x+y)*(x+y)^2/(x-y)^2
=27a^3/(x-y)
(2x+y)(2x-3y)+x(2y+y) 2a(x-y)-4b(x-y)
（3a^3/X+Y)^3*(X^2-Y^2)除以（Y-X/Y+X)^2
因式分解：a(x-y)^2+b(y-x)^3 4(x-y)^2+8(y-x)(x+y)1.a(x-y)^2+b(y-x)^3 2.4(x-y)^2+8(y-x)(x+y)
因式分解:3a(x-y)-(x-y)
3a(x-y)-(y-x) 因式分解
x(x-y)2-(y-x)3
36a^3(x-y)^2/27a(y-x)
5a(x-y)^2+10a(y-x)^3
[2/3x-2/x+y(x+y/3x-x-y)]/x-y/x
化简：{2/3x-2/(x+y)[(x+y)/3x-x-y]}/(x+y)/x
计算2/3x-2/x+y(x+y/3x-x-y)/x-y/x
化简3x-2/(x+y)[(x+y)/3x-x-y]÷(x-y)/x
[(3x+y)(x-y)-(2x+3y)(x-y)]*(x-y)
计算：x+2y/x-y+2x/y-x-3y/x-y
化简:(x-3y)(x+y)-(x-2y)(x+2y)-(x-y)平方
1.计算(a^2+a+1)(a^2-a+1) 2.计算(x-y)(x+y)+(3x-2y)(2x+y)-x(6x-y)
因式分解：(x+y)^3(x-y)-(x+y)(x-y)^3,9x^2-16(a+b)^2
a(x-3)(y-2)+b(3-x)(2-y)