Вычислите 7/12-5/9.

\[\frac{7^{\backslash 3}}{12} - \frac{5^{\backslash 4}}{9} = \frac{7 \cdot 3 - 5 \cdot 4}{36} =\]

\[= \frac{21 - 20}{36} = \frac{1}{36}.\]