计算 :2(x-y)^2-(y-x)^2-(x+y)(y-x)
计算:1/(2x) - 1/(x+y)((x+y)/(2x) - x - y)
计算:(3x-y)2-(2x+y)2+5x(y-x)
计算:(3x-4y)-[-(2y+x)+(x-3y)]-6x
(x-y/x+2y)³
(x+y)^2-(3x-2y)^2计算
初二下册计算:(x-y /x+2y)³
计算(x^2-y^2)÷(x分之x-y + y^2分之x^2-y^2 - x-y分之x+y)
求因式分解(x-y)²-2(x-y)³和(x+y)(x-y)-x(x-y)
计算:(x-y)m(y-x)2m+(y-x)3m.
计算:(11x+y)(-11x+y)+(11x+y)的2次方
x根号x+x根号y/xy-y^2)-(x+根号xy+y/x根号x-y根号)y
计算:(X+Y)^5÷(-X-Y)^3*(X-Y)^2