Выполните действия: 7/9+5/12-3/4.

\[\frac{7^{\backslash 4}}{9} + \frac{5^{\backslash 3}}{12} - \frac{3^{\backslash 9}}{4} =\]

\[= \frac{28 + 15 - 27}{36} = \frac{16}{36} = \frac{4}{9}.\]