2道分式加减法.(2/3a²)+(3/4b)-(5/6ab)=?(a+2b/a-b)+(b/b-a)-(2a/a-b)=?

问题描述:

2道分式加减法.(2/3a²)+(3/4b)-(5/6ab)=?(a+2b/a-b)+(b/b-a)-(2a/a-b)=?