Simplify: 3a−2b1ab\frac{\frac{3}{a} - \frac{2}{b}}{\frac{1}{ab}}ab1a3−b2
3b−2a3b - 2a3b−2a
3a−2b3a - 2b3a−2b
ab(3b−2a)ab(3b-2a)ab(3b−2a)
3b−2aab\frac{3b-2a}{ab}ab3b−2a