计算（1+3x)(3x-1)+9(1/3-x)(x+1/3)的结果是___

计算:x/(1-x)-1/(x-3) 计算:|3-x|+|x-1|(x>5) 计算 2+x+3/x-1*x^2-2x+1/x^2+6x+9 计算1/x×(x+3)+1/(x+3)×(x+6)+1/(x+6)×(x+9)+1/(x+9)×(x+12) 计算：(3/x)+(x/x²-1)-(4/1-x) 计算(x+1)(x+2)(x+3)(x+4) 计算：（x+1)(x-2)(x-3)(x-6) 计算 x(x+3)-(x-1)(x-2） 如何计算 (x+1)(x+2)(x+3)(x+4) 计算(X-1)(X-2)(X-3)(X-4) (x-1)(x-2)(x-3)(x-4)-24计算 计算：x/(x-1)-(x+3)/(x^-1)*(x^2+2x+1)/(x+3) 计算:[(x^2 - 4)/(x^2 - x - 6) + (x+2)/(x-3)] / (x+1)/(x-3) 计算：1-2x+x^2/x-x^3*xy+x^2y/x-x^2 计算1/x-3 - 6/x*x-9 - x-1/6-2x 计算：(1)/(x-3)÷(x+2)/(x^2-9)-(1)/(x^2+5x+6) 计算3/x-2+2/1-x (x-1)(2x-3)计算过程