怎样化简:4x^3(-y^3)^2-3x*(-x)^2*(-y^2)^3

怎样化简:4x^3(-y^3)^2-3x*(-x)^2*(-y^2)^3 3(x-y)-2(x+y)-5(x-y)+4(x+y)+3(x-y) 化简合并同类项 2(2X-3Y)-(3X 2Y 1)怎样化简 (8x-3y)-(4x+3Y-z)+22怎样合并化简, 怎样化简：2x²-2y²+3xy-5y²+x² (3x-2y)( y-3x)怎样算 化简求值{(x=2y)(5x-2y)-(3x+2y)(3x-2y)]/4x,其中x=2,y=-1 初二化简求值题[（5x+2y)(3x+2y)+(x+2y)(x-2y)]/4x,其中x=2,y=3 化简求值：已知x、y满足：x^2+y^2-4x+6y+13=0 求代数式 的值.(3x+y)^2-3(3x-y)(x+y)-(x-3y)(x+3y)急用！ x^2(x+2y)-9x^2(3x+y)^2怎样因式分解? 怎么化简-2(x-3y) 3(2x-y)-4(2x 3y)? x+y=36；x-（y-x）=3/4x. 怎样算 请问如何化简(4x-y)/x^2y^2 - (x+y)/xy^3 y=x的平方怎样平移得到y=-2x的平方+4x-3x的图像 x+(-y+3) x-(-3-y) -(x-y)+3 3-(X+Y) 怎样去括号?快 (x-y) (x-2y)+(x+2y) (x-3y)-2(x-3y) (x-4y)= 4x - 2y + 5x怎样化简? x²/xy-x/y 3x/4x+y - x-2y/4x+y (1-y/y+x)÷x/y²-x²