5/p-1 - 5/p = .................

[tex] \frac{5}{p-1} - \frac{5}{p} = \frac{5p - 5(p-1)}{p(p-1)} \\ \\ = \frac{5p - 5p + 5}{ p^{2} - p } \\ \\ = \frac{5}{ p^{2} - p} [/tex]