计算:【(2x+y)^2-(x-y)(-x-y)】÷2x
计算:1/(2x) - 1/(x+y)((x+y)/(2x) - x - y)
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)
计算:(X+Y)^5÷(-X-Y)^3*(X-Y)^2
计算:(3x-y)2-(2x+y)2+5x(y-x)
计算4(x+y)^5(x-y)^4÷[2(x+y)³*(y-x)²]
计算:(3x-4y)-[-(2y+x)+(x-3y)]-6x
计算 1.(-2x)^3-3x乘(x-2x^2) 2.【(x+2y)^2-(x-2y)(x+2y)】÷4y
(x+y)^2-(3x-2y)^2计算
初二下册计算:(x-y /x+2y)³
(x-y/x+2y)³
计算:(x+2y)(3x-5y)-(6x的四次方y²-2x²y²)÷(2x²y&
计算(1)x/x+y-x/x-y (2)a+2+4/a+2 (3)x^2-y^2/xy÷(x+y)