化简2x-【2(x+4)-3(x+2y)】-2y
1.((y+2x)(-2x+y)+4(x+2y)^2)/3y 2.(2(x-y)^3-8(x-y)^2(x+y)+6y(
(X-3Y)(X+3Y)-(X+2Y)(X-4Y)-(2X-Y)2的平方
化简:(x-3y)(x+y)-(x-2y)(x+2y)-(x-y)平方
化简,亲快啊啊急!(3x-2y)(7x-y)-(4x+3y)(x-y)
(3x-y)²-2x(4x-5y)-(x+2y)²
计算:(3x-4y)-[-(2y+x)+(x-3y)]-6x
(x-y)(x-2y)-(3x-2y)(x-3y)
(x-2y)²+(2x-4y)(x+y)+(x+y)²
化简:(2x-y)²-4(x-y)(x+y)
x/x-y*y^2/x+y-x^3y2/x^4-y^4/x^2/x^2+y^2
2(x-y)+3(x+y)2-5(x-y)-8(x+y)2-(x-y)
(x+3y-4)(2x-y)