Discussion

What is the value of [$\frac{1}{5}$ + {$\frac{1}{7}$ of ($\frac{25}{42}$ ÷ $\frac{35}{6}$) - ($\frac{4}{7}$ × $\frac{6}{5}$ ÷ $\frac{54}{63}$} + $\frac{28}{40}$]