先化简：（3/x+1-x+1)÷x^2-4x+4/x+1,然后从-1

*-----------------------------------------------*| 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 || 填九宫格帮帮忙.x x 6 x x 7 x x 98 x x x 3 x 1 x x 9 x x 6 x 5 x 3 x x x 3 x x x x 1 8x x x 9 x 1 x x x2 1 x x x x 6 x x x 6 x 7 x 3 x x 1 x x 9 x 2 x x x 47 x x 8 x x 5 x x 七年级下册政治复习提纲(山东人民出版社)第五单元是 青春的脚步 青春的气息别弄错了啊!格式：X X X X X X X X X 1、X X X X X X X X X X.2、X X X X X X X X X.3、X X X X X X X X X X 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+1-1/1-x)÷(x-x²/x-1) (x-4/x-x-6+ x+2/x-3)÷x+1/x-3 先化简代数式再求值(3/x+1 - x+1)÷x²-2x/x+1,其中x满足方程x/x-1+1/x=1 先化简,再求值:(2-x/x^2+x)/(x^2-3x/x^2+2x+1)x(9-x^2/4-2x),其中x=-2 X^2-3X-2=0,求( x - 2x-1/x )÷(x-1)/(x^2-2x) x+2/x+1-x+3/x+2-x+4/x+3+x+5/x+4 先化简(2x-1)²-(3x+1)(3x-1)+20x³(x-1)÷(-2x)² 先化简,再求值:(3x+4/x²-1-2/x-1)÷x+2/x²-2x+1 先化简,再求值:(1+x)/(x²+x-2)÷[(x-2)+(3)/(x+2)],其中x=1/2 先化简,再求值:(1/x²-2x-1/x)÷x-3/x²-4,其中x=4 先化简,再求值:(1/x²-2x-1/x)÷x-3/x²-4,其中x=4 x{x+1}{x-1}}x-2}{x-3}-40 先化简,再求值 2x-6/4-4x+x^2÷x-3/x-2,其中x=-1 |x+1|-|x|+|x-2|-|-x+3|已知x+2 x^5-x^4+x^3-x^2+x-1