计算：（x+2/x^2-2x-x-1/x^2-4x+4）×x/4-x

计算：x(x^2+x-1)-(x^2-x+1) 计算：1-2x+x^2/x-x^3*xy+x^2y/x-x^2 计算:[(x^2 - 4)/(x^2 - x - 6) + (x+2)/(x-3)] / (x+1)/(x-3) 计算：x/(x-1)-(x+3)/(x^-1)*(x^2+2x+1)/(x+3) 计算 （x-1/x)/(x+1/x-2) 计算：x(x-1)(x+1)(x+2)-24 Lim(x>1) x-1/x^2+x-2.计算 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 x/x-3-5x/x^2-x-6计算 计算:x/x-2 - 5x/x²-x-6计算:x/x-3 - 5x/x²-x-6 *-----------------------------------------------*| 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:[(x+2)/(x+3) - (x+1)/(x+2) + (x+4)/(x+5) - (x+3)/(x+4) / (x^2 + 7x + 13)/(x^2 + 8x + 15) 1.用公式计算：COSX=1-X*X/2!X*X*X*X/4!-X*X*X*X*X*X/6!.直到最后一项的绝对