1.14a²bc/-2ac²
2.2x+8/x²-16
3.x/2a²b ÷（-2xb）
4.x-1/1 + 1+x/1
5.a²-1/a + a²-1/3a+1 + 1-a²/2a+1
6.x²-2xy+y²/x²-y²,其中x=110,y=10.（先化简,再求值）
7.已知（x-1)(x-2）/3x-4 = x-1分之A + x-2分之B,求实数A,B.
8.(1-x）²/2x；
1.-7ab/c
2.(x-4)/2
3.-a^2*b/2*x^2*b
4.2*x/(x^2-1)
5.2*a/(a^2-1)
6.(x+y)*(x-y)/(x-y)^2=(x+y)/(X-y)=1.2
7.(3x-4)/(x-1)(x-2)=1/(x-1)+2/(x-2) 所以 A=1 B=2
8.2/(1-x)(1/x-1)