[tex]( \frac{7}{3} + \frac{1}{5} ) \div \frac{1}{4} = ( \frac{35 + 3}{15} ) \div \frac{1}{4} = \frac{38}{15} \div \frac{1}{4} = \\ \\ \frac{38}{15} \times \frac{4}{1} = \frac{152}{15} = 10 \frac{2}{15} [/tex]