化简|1-x+y|-|x-y|(x＜0,y＞0）=________?

化简|1-x+y|-|x-y|(x＜0,y＞0）=________? x^/y-x-y^/y-x化简. 化简x(y-x)-y(x-y) 已知x,y两数在数轴上的位置如图所示,化简|1+y|-|1+x|+|x+y|-|y-X|y＜-1 1＞x＞0 化简x/y(x+y)-y/x(x+y) 化简 x / y(x+y) - y / x(x+y) = 化简:(x+ y)(x-y) +(x+ y) +(x-y) 化简y(x+y)+(x+y)(x-y)-x^2 不等式证明猜想(X^y+ Y^y)^x>(Y^x+ X^x)^y (x>y>0) |x-y|+|y+1|=0化简 已知x＜0,xy＜0.化简| x-y-1 | + | y-x+3 | 化简 3x(x^2-x-1)-(x+1)(3x^-x) X^3(x-y)+x(y-x) {(x,y) |x|+|y| x>y?x:y (x+y)(x-y)+4(y-1) 化简：(1)(x+1)^2-x(x^2+x-1)-(x^2+1)^0(2)(y-2)(y^2-6y-9)-y(y^2-2y-15) 化简(2x+y)(2x-y)-(x+2y)(x-2y-1) 化简3x-2/(x+y)[(x+y)/3x-x-y]÷(x-y)/x