$\frac{(28 : 1\frac{3}{4} + 1\frac{1}{3} : 22 + 1\frac{2}{3} * 9 \frac{3}{11} + 4 : 1\frac{1}{2}) * 3\frac{1}{7}}{67\frac{1}{7} - 47 * \frac{2}{7}} = \frac{(28 : \frac{7}{4} + \frac{4}{3} : 22 + \frac{5}{3} * \frac{102}{11} + 4 : \frac{3}{2}) * \frac{22}{7}}{67\frac{1}{7} - \frac{94}{7}} = \frac{(7 * 4 * \frac{4}{7} + \frac{2 * 2}{3} * \frac{1}{2 * 11} + \frac{5}{3} * \frac{34 * 3}{11} + 4 * \frac{2}{3}) * \frac{22}{7}}{67\frac{1}{7} - 13\frac{3}{7}} = \frac{(16 + \frac{2}{3} * \frac{1}{11} + \frac{5}{1} * \frac{34}{11} + \frac{8}{3}) * \frac{22}{7}}{54\frac{1}{7} - \frac{3}{7}} = \frac{(16 + \frac{2}{33} + \frac{170}{11} + \frac{8}{3}) * \frac{22}{7}}{53\frac{8}{7} - \frac{3}{7}} = \frac{(16 + \frac{2 + 170 * 3 + 8 * 11}{33}) * \frac{22}{7}}{53\frac{5}{7}} = \frac{(16 + \frac{2 + 510 + 88}{33}) * \frac{22}{7}}{\frac{376}{7}} = \frac{(16 + \frac{600}{33}) * \frac{22}{7}}{\frac{376}{7}} = \frac{(16\frac{600}{33}) * \frac{22}{7}}{\frac{376}{7}} = \frac{\frac{1128}{33} * \frac{22}{7}}{\frac{376}{7}} = \frac{1128}{33} * \frac{22}{7} * \frac{7}{376} = \frac{376 * 3}{3 * 11} * \frac{2 * 11}{7} * \frac{7}{376} = 2$