计算(2y+1)^2×(2y+1)^3+(2y+1)^4【-(2y+1)】

计算(2y+1)^2×(2y+1)^3+(2y+1)^4【-(2y+1)】 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/ (2x+y)(x+3y-1)计算 (1)计算：a-(a^2)/(a+1)-1 (2)计算：3x/(x-4y)+(x+y)/(4y-x)-7y/(x-4y) [(-x-y)(-x+y)-(x+y)^2-x(y-y^2)}÷1/2y 解方程3y^2-(2y+1)(y-2)=(y-5)(y-1) 解方程：3y^2-(2y+1)(y-1)=(y-5)(y+1) 已知x=2+根号3,y=2-根号3,计算代数式(x+y/x-y-x-y/x+y)乘以(1/x^2-1/y^2) 计算[1]y+2分之y的平方-6y+9除以[3-y] [2] x的立方分之x的平方y乘以[-y分之1] 计算:(x-2y)(1+x+2y+4y^2+2xy+x^2) 计算：(1) x+2y+(4y^2/x-2y