计算：(1)4x^1/4(-3x^1/4y^-1/3)/(-6x^-1/2y^-2/3)

计算:1/(x-y)-1/(x+y)-2y/(x^2+y^2)-4y^3/(x^4+y^4)-8x^7/(x^8+y^8 计算(4x^2-2x^3+6x)/(-2x)-(x-1)^2y^2-4/y^2-y-6)+(y+2/y-3)/(y+1/ 分解因式计算:x^2(x-y)+(y-x)=?x^3+x^2+1\4x=?(2x+y)^2-(x-2y)^2=? {3(x+y)-4(x-y)=4 {x+y/2 + x-y/6=1 计算1/6x-4y +1/6x+4y — 3x/4y^2-9x^2 (1)计算：a-(a^2)/(a+1)-1 (2)计算：3x/(x-4y)+(x+y)/(4y-x)-7y/(x-4y) (1)(2x-3y)的平方-(y+3x)(3x-y) (1~4是计算) (2)[(x-y)的平方+(x+y)的平方](x 计算(x+4)·(-2x)-(x+1)(x-1)+(-3x+2)(x+1)； （3x-y)(y+3x)-(4x-3x)( （x+2)(x+3) (x-4)(x+1) (y+4)(y-2) (y-5)(y-3) 计算6x³y^6÷(1/2)y³÷(-3x²y)-(12x^4y^6-8x²y^ 计算（1）x/x+y-x/x-y （2）a+2+4/a+2 （3）x^2-y^2/xy÷(x+y) 计算：3x-(4y-2x+1)