Найдите значение выражения
\(3 : (\frac{3}{4}+\frac{9}{16})+\frac{2}{3}\cdot(\frac{5}{7}-\frac{9}{21})\) .

• \(\frac{52}{21}\)
• \(\frac{109}{21}\)
• \(\frac{8}{63}\)
• \(\frac{37}{63}\)
• \(\frac{23}{28}\)