32(x·y)^4÷[-8/9(y-x)^3]

计算：(x-y)^8÷(y-x)^4×(x-y) 32(x·y)^4÷[-8/9(y-x)^3] 计算 [ ( x+y ) ( x-y ) ] ^ 9 ÷ ( y-x )^ 8 ÷ ( -x-y )^9 计算.3(x-y)²/(y-x)³·(x-y)²÷9/y-x 4x-3y/x-2y÷6y-8x/y-2x （x-y)^3·(y-x)^4 / [(x-y)^8/(y-x)^3] 81/8*(-x-y)^6*(x-y)^3*4/9(x+y)^4*(y-x)^2 [(x+y)(x-y)-(x-y)²+2y(x-y)]÷4y 已知x+4y-2x+8y+5=0,求x^4-y^4/2x+xy-y·2x-y/xy-y÷(x+y/y)的值.数学上交不不算请教下. 1.(x^3-x^2-4x+1)/(x^2-3x+2)-(x^3-2x^2-9x+21)/（x^2-5x+6）+（x^2-3x+8）/（x^2-4x+3）2.{(x^2)/（x-y)}*{y/(x+y)}-{(x^4y)/(x^4-y^4)}÷{（x^2/x^2+y^2）^2} [x／（x-y）]·[y²／（x+y）]-[x^4y／（x^4-y^4）]÷[x²／（x²+y²）]= 计算.2x÷x/5x+3y^2-4y+4/2y-6·1/y+3÷12-6y/9-y^2 [4(x+y)平方-x-y]÷(x+y) [(2X+y)-y(y+4X)-8X]÷2x 9y=3x-(x-1),4(x+y)-(2x+4)=8y 4+12(x-y)+9(x-y)^ x²/xy-x/y 3x/4x+y - x-2y/4x+y (1-y/y+x)÷x/y²-x² 1.（－2a）³·b²÷(8a³b²) 2.－5x（2x²－3x＋4）+4x³+15x3.（x²-2y²）(x+2y)-2xy(x-y)4.（x-y+z）(x-y-z)化简求值 ［（x+y）(x-y)-(x+y)²-2y(x-2y)］÷(-2y),其中x=5,y=2003