Divide: a+ba−b÷a+ba\frac{a+b}{a-b} \div \frac{a+b}{a}a−ba+b÷aa+b
111
aaa
aa−b\frac{a}{a-b}a−ba
a2(a+b)(a−b)\frac{a^2}{(a+b)(a-b)}(a+b)(a−b)a2