Tính nhanh: 2 x 3/7 + (2/9 - 1 3/7) - 5/3 : 1/9

$$\begin{gathered} \mathrm{Bài} 1: \mathrm{Tính} \mathrm{nhanh} \\ 1) 2\times \frac{3}{7}+\left(\frac{2}{9}-1\frac{3}{7}\right)-\frac{5}{3}÷\frac{1}{9} \\ 2) \left(\frac{377}{‐231}-\frac{123}{89}+\frac{34}{791}\right)\times \left(\frac{1}{6}-\frac{1}{8}-\frac{1}{24}\right) \\ \mathrm{giúp} \mathrm{vs} \mathrm{ạ} \mathrm{đg} \mathrm{cần} \mathrm{gấp}!! \end{gathered}$$