计算 1/2x+6+1/3-x+x/[2(x^2-9)]

计算：（x+1)(x-2)(x-3)(x-6) 计算:[(x^2 - 4)/(x^2 - x - 6) + (x+2)/(x-3)] / (x+1)/(x-3) 计算 2+x+3/x-1*x^2-2x+1/x^2+6x+9 (x-6)(x的平方+x+1)-x(2x+1)(3x-1)计算 计算x^2-5x+6/x^2-1/x^2+x/x-3 计算（x*x+4x+5）/（x+2）-（x*x+6x+10）/（x+3）+1 计算:6x^2-[-3x^2-(x-1)] 计算(x+1)(x+2)(x+3)(x+4) 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：1-2x+x^2/x-x^3*xy+x^2y/x-x^2 *-----------------------------------------------*| 6 4 X | 8 X X | X X 5 || X X X | X X X | X 7 8 || X X X | X X X | X X X ||---------------+---------------+--------------- || X X X | X X X | 5 1 X || X X X | X 6 X | X X X || 8 X X | 3 5 X | 2 X X || 计算：(1)/(x-3)÷(x+2)/(x^2-9)-(1)/(x^2+5x+6) 计算:1/(x+1) * [(x-3)/(x^2 + 6x + 9) + 2/(3+x)] - x/(x^2 - 9) 计算:(4x^4-6x^2+2)(5x^3-2x^2+x-1),