计算(3y-1)(2y+3)-(6y-5)(y-4)
计算(2y+1)^2×(2y+1)^3+(2y+1)^4【-(2y+1)】
计算(4x^2-2x^3+6x)/(-2x)-(x-1)^2y^2-4/y^2-y-6)+(y+2/y-3)/(y+1/
计算:(x+y)^2×(-x-y)^3×[-3/4(x-y)^3]×5/6(y-x)^2
解3y+5/3y-6=1/2+5y-4/2y-4
计算(x^8-x^7y+x^5y^3-x^4y^4+x^3y^5-x^y^7+y^8)(x^2+xy+y^2)
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6x³y^6÷(1/2)y³÷(-3x²y)-(12x^4y^6-8x²y^
3x+2=y 5X+4=Y 7X+6=Y 9X+8=y 11x=y要如何计算
(x-3y)(y+2x)-(4y-3x)(3x+4y)计算
计算(2x-3y)(x+4y)-(3x+y)(x-2y)
计算【3(x-y)^2(x+y)^-2/4(x+y)^2(x-y)^-2】^-2
计算:[(2x - 3y)^2 - (x-y)(4x+2y)] / 2y