[tex]\frac{7}{8} + (\frac{3}{4} - \frac{1}{2} * \frac{1}{4}) * \frac{5}{7} = \frac{7}{8} + (\frac{3}{4} - \frac{1}{8}) * \frac{5}{7} = \frac{7}{8} + (\frac{6}{8} - \frac{1}{8}) * \frac{5}{7} = \frac{7}{8} + \frac{5}{8} * \frac{5}{7} = \frac{7}{8} + \frac{25}{56} = \frac{49}{56} + \frac{25}{56} = \frac{74}{56} = \frac{37}{28}[/tex]
