\(=\frac{\frac{1}{3}-\frac{1}{4}+1}{\frac{1}{2}-\frac{3}{7}}\)
\(=\frac{\frac{4}{12}-\frac{3}{12}+\frac{12}{12}}{\frac{7}{14}-\frac{6}{14}}\)
\(=\frac{\frac{13}{12}}{\frac{1}{14}}\)
\(=\frac{13}{12}\times\frac{14}{1}\)
\(=\frac{13}{6}\times7\)
\(=\frac{91}{6}\)