[tex] 9\frac{21}{28} " alt="6 \frac{1}{4} -2 \frac{5}{7} +6 \frac{3}{14} = \frac{25}{4} - \frac{19}{7} + \frac{87}{14} = \frac{175}{28} - \frac{76}{28} + \frac{174}{28} = \frac{175-76+174}{28} = \frac{273}{28} =
[tex] 9\frac{21}{28} " align="absmiddle" class="latex-formula">