Задача Задача №3728887
А
А
\[ \frac{19}{7\cdot13^2}-\frac{1}{3^2\cdot11} =\frac{19\cdot99-1183}{1183\cdot99} =\boxed{\frac{698}{117117}} \]
\[ \frac{19}{7\cdot13^2}-\frac{1}{3^2\cdot11} =\frac{19\cdot99-1183}{1183\cdot99} =\boxed{\frac{698}{117117}} \]