[tex] {( \frac{3}{5} - \frac{1}{1}) }^{3} = \frac{3}{5} - 1 = \frac{3}{5} - \frac{1}{1} = \frac{3}{5} - \frac{1 \times 5}{1 \times 5} = \frac{3}{5} - \frac{5}{5} = \frac{3 - 5}{5} = - \frac{2}{5} = {( - \frac{2}{5}) }^{3} = \frac{ { - 2}^{3} }{ {5}^{3} } = \frac{ - 8}{125} = - \frac{8}{125} [/tex]
