将3x^2y^3+2x^3y^2-7y^3x^2-(x^2y^3-8)合并同类项后,含x^2y^3的项的系数是什么?

将(x-y)看成一个整体,将3(x-y)²-4(x-y)+7(x-y)-6(y-x)²-2(y-x)合并同类项. 化简3(x-y)-7(x--y)+2(y-x) x(x-y)2-(y-x)3 x-y/x+y=-1/2,x*x-xy-2y*y/x*x-3xy+2y*y的解是多少?同上,请将过程写出, [(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 [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 若将x-y看成一个整体,合并多项式(x-y)2+3(x-y)-2(y-x),可得多少 若将X-Y看成一个整数,合并多项式（X-Y)²+3(X-Y)-2(Y-X),可得? 若将x-y看成一个整体,合并多项式(x-y)+3(x-y)-2(y-x),可得------- (-3x+7y)(-7y-3x)-(x-3y)(2x+3y) 18(x+y)^8(x-y)^7÷[3(x+y)^3(x-y)^3]^2 3(x-y)^2-7(x-y)+8(y-x)^2+6(y-x)合并同类项. 若(x-y)/(x+y)=3 则(x+2y)/(6x-7y)等于