(-2Y+3X)(-2-3X)怎么算?
y+(1+x)(2+x)(3+x)导数怎么算,
(2x-3y)-(5x-y)怎么算
(5*x+2*y)/(x+y)=3,求x与y的关系,是不是x=2y?怎么算?
(2x+3y-1)(2x-3y+1)怎么算?
(x-y)(x-2y)-(3x-2y)(x-3y)
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2(x-y)+3(x+y)2-5(x-y)-8(x+y)2-(x-y)
(X-3Y)(X+3Y)-(X+2Y)(X-4Y)-(2X-Y)2的平方
1.((y+2x)(-2x+y)+4(x+2y)^2)/3y 2.(2(x-y)^3-8(x-y)^2(x+y)+6y(
(x+3)(x+2)怎么算啊?4x²-9y² 怎么算(过程) 3x²y×(-2xy&sup
(y-x)(x-y)^3(y-x)^5怎么算
7x+[-3x-3(x-2y)]-[5x-(2x-y)]