x^25÷[(-x^2)^3]^4·(-x^3)^2÷(-x^2)^5(a-b)^5·(b-a)^2÷(b-a)^3地球体积约为1.1×10^12平方米月球体积约为2.2×10^10平方米问地球是月球体积多少倍?先化简再求值a^3(-b^3)^2+(-1/2ab^2)^3其中a=0.25 b=4做好了就给分.

计算①x²-4／x²-4x+3÷x²+3x+2／x²-x②2x+6／4-4x+x²÷(x+3)·x²+x-6／3-x [x^2+2x-8/x^3+2x^2+x]÷[(x-2/x)×(x+4/x+1)]化简[x^2+2x-8/x^3+2x^2+x]÷[(x-2/x)×(x+4/x+1)]化简 x-2x+3x-4x+5x.+99x-100x=25求解 *-----------------------------------------------*| 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 || 化简 [3x/(x+2)-x/(x=2)]÷x/(x^2-4)化简 [3x/(x+2)-x/(x-2)]÷x/(x^2-4 3x/(x-2)-x/(x+2)÷2x/(x-4)化简3x/（x-2）-x/(x+2)÷2x/(x²-4)化简 (x+1-1/1-x)÷(x-x²/x-1) (x-4/x-x-6+ x+2/x-3)÷x+1/x-3 两道初二数学计算题（1）x+6/x^2+2x+1-x+4/x^2+x=0（2）x+3/x÷x^2+3x/x-3·1/3-x 化简：2x-6/4-4x+x²÷（x+3）·x（x+3）-2（3+x）/3-x 计算:(x^2-8x+16/x^2+2x+1)^3÷x-4/x+1)^4·(x+1/x+2)^2 3-x/2x-4÷（x+2 - 5/x-2)(1/x+1 + 1/x-1)÷ x/x+11/x+1 - x+3/x²-1 · x²-2x+1/x²+4x+3（1/x - 1/2)÷（1- x²+4/4x ） (2x-6)/(x²-4x+4)÷(3-x)/(x²+6x+9)×(2-x)/(x+3) （x+1)(x+2)(x+3)(x+4）+1(x+1)(x-2)(x+3)(x-4)+25 -x^2·(-x)^3+3x^3·(-x)^2-4(-x)(-x)^4 -x^2·(-x)^3+3x^3·(-x)^2-4(-x)(-x)^4 求解 化简(3x/x-2-x/x+2)÷2x/x平方-4 解方程:x-2x+3x-4x+...+99x-100x=25 解方程：x-2x+3x-4x+.+99x-100x=25