Рассмотрим каждое выражение по отдельности:
\(\frac{47}{9} - \frac{6}{9} = \frac{47-6}{9} = \frac{41}{9}\)
\(\frac{38}{5} - \frac{3}{5} = \frac{38-3}{5} = \frac{35}{5} = 7\)
\(\frac{28}{6} - \frac{23}{6} = \frac{28-23}{6} = \frac{5}{6}\)
\(\frac{21}{5} + \frac{3}{5} = \frac{21+3}{5} = \frac{24}{5}\)
\(\frac{17}{4} - \frac{14}{4} = \frac{17-14}{4} = \frac{3}{4}\)
\(\frac{23}{47} - \frac{14}{47} = \frac{23-14}{47} = \frac{9}{47}\)
\(\frac{3}{29} + \frac{6}{29} = \frac{3+6}{29} = \frac{9}{29}\)
\(\frac{7}{18} + \frac{5}{18} = \frac{7+5}{18} = \frac{12}{18} = \frac{2}{3}\)