计算 (2x-y)(2x+y)-(2y+x²)(2y-x²)
求因式分解(x-y)²-2(x-y)³和(x+y)(x-y)-x(x-y)
运用乘法公式计算:(1)(x-y)(x+y)-(2x-y)²
计算4(x+y)^5(x-y)^4÷[2(x+y)³*(y-x)²]
(x-2y)²+(2x-4y)(x+y)+(x+y)²
(x-y)的四次方(x-y)-2(x-y)²(y-x)³等于?
计算:1/(2x) - 1/(x+y)((x+y)/(2x) - x - y)
计算:(x+2y)(3x-5y)-(6x的四次方y²-2x²y²)÷(2x²y&
计算:(1)2/(x+y)+4y/x²-y²(2)x²/x+y-x+y
分式计算:(x²+2xy+y²)/(x²y+xy)*y/(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