-(1+3X-2Y)怎么算

(x-2y)^m+1/(x-2y)^m-3/(2y-x)^3怎么算 y+(1+x)(2+x)(3+x)导数怎么算, -(1+3X-2Y)怎么算 (2x^3y^3-2x^3y+1/8^4+y)/(-1/2x^3y)怎么算! (2x+y-1)(2x+y-1)怎么算 (2x-3y)-(5x-y)怎么算 (x-y)^2(y-x)^3怎么算啊, (y-x)(x-y)^3(y-x)^5怎么算 x^2-4Y^2+X+3Y-1=0 2X-Y-1=0 怎么算 (2x+y-1)(2x-y-1)=?和（3x+y-5a）的平方怎么算 (3x-2y+1)(3y+2y-1)怎么算 （x-y)^3*(x-y)^2*(y-x)这道题怎么算（x-y)^3*(x-y)^2*(y-x)看不懂？（x-y)^3乘(x-y)^2乘(y-x)总可以了吧 （2x+3y-1）（2x-3y+1）怎么算? {x+4y=14 {x-3/2-y-3/3=1/12 怎么算 x+2y/2 = 2x-y/3 = 1怎么算? -3（2x-y）+2（4x+2分之1y） 怎么算 2x-y=8 3x+2y=5与3x+2y=1 3x-4y=-11用加减法怎么算? X^2-2XY+Y^2-X+Y-2=0怎么算等于(x-y-2)(x-y+1)?