1.c/2ab+b/3a^2c-a/5c^2
2.2x+2+(5/x-1)
3.(a+1/a^2+3a+2)+(a+3/a^2+7a+12)
4.(x/a-y+y/y-x)/(xy/x-y)
5.(3-m/2m-4)/(m+2-5/m-2)
6.(a+1/2a-2 -3/2a^2-2 -a+3/2a+2)* 4a^-4/3
7.(a-b/a+b-a+b/a-b)/(1- a^2+b^2/a^2-2ab+b^2)
8.[(1+ 4/x-2)(x-4+ 4/x)-3]/(4/x -1)
9.[1/a^2 + 1/b^2 + (2/a+b)(1/a+1/b]/[(a+b)^2/ab]
10.已知x^2-3x+1=0求 1.x+1/x 2.x^2+1/x^2 3.x^4+1/x^4的值
11.化简x-2/x^9-9(1+ 2x-7/x^2-4x+4)/ 1/x+3 并求x=2006时的值
12.化简(x^2+4x+4/x^2-6x+9 -2+ 9-6x+x^2/4+4x+x^2)*x^2-x-6/4x^2-4x-1
麻烦有过程都写出来