(3x^3y^2)^4÷(6x^2y)^2-(-1/3x^3y^2)^2·(1/2xy)^2

4x-3y/x-2y÷6y-8x/y-2x x²/xy-x/y 3x/4x+y - x-2y/4x+y (1-y/y+x)÷x/y²-x² [2(x-y)^5-8(x-y)^2(x+y)+6y(x-y)^2]÷2(x-y)^2[2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2]÷2(x-y)^2 化简3x-2/(x+y)[(x+y)/3x-x-y]÷(x-y)/x 计算：(x-y)^7÷(y-x)^6+(-x-y)^3÷(x+y)^2 计算(x-y)^7÷(y-x)^6+9-x-y)^3÷(x+y)^2 [12(x+y)^3+3(x+y)(x-y)^2]÷6(x+y) x+y/2+x-y/3=6,4(x+y)-3(x-y)=-20 {(x+y)/2+(x-y)/3=6 4(x+y)-3(x-y)=-20 4(x+y)-3(x-y)=-20,2/x+y+3/x-y=6 （x+y）/2- x-y/2=6 3(x+y)=4(x-y) x+y/3+x-y/2=6 4(x+y)-2(x-y)=40 {3(x+y)-4(x-y)=4 {x+y/2 + x-y/6=1 81/8*(-x-y)^6*(x-y)^3*4/9(x+y)^4*(y-x)^2 （y-x）^4（x-y）^3+2（x-y）^6（y-x） 化简：x-y/x+3y÷x^-y^2/x^2+6xy+9y^2-(xy/x+y) (66x^6y^3-24x^4y^2+9x^2y)÷(-3x^2y)化简 (x-y) (x-2y)+(x+2y) (x-3y)-2(x-3y) (x-4y)=