分式计算1.(4/a-1)-(2/a+2)-(2/a-2)-(4/a+1) 2.(x²+4x+5)/(x+x)-(x²+6x+10)/(x+3

问题描述:

分式计算1.(4/a-1)-(2/a+2)-(2/a-2)-(4/a+1) 2.(x²+4x+5)/(x+x)-(x²+6x+10)/(x+3