\frac{4\frac{2}{7}:1\frac{1}{4}-3\frac{2}{5}*1\frac{1}{4}}{(16\frac{2}{7}-14\frac{1}{34})*\frac{1}{71}}=\frac{\frac{30}{7}:\frac{5}{4}-\frac{17}{5}*\frac{5}{4}}{(\frac{114}{7}-\frac{477}{34})*\frac{1}{71}}=\frac{\frac{30}{7}*\frac{4}{5}-\frac{17}{4}}{(\frac{3876}{238}-\frac{3339}{238})*\frac{1}{71}}=\frac{179}{5751}