б) $$\frac{2}{x - 5} + \frac{x + 5}{5x}$$;

б) $$\frac{2}{x - 5} + \frac{x + 5}{5x} = \frac{2 \cdot 5x + (x + 5)(x - 5)}{5x(x - 5)} = \frac{10x + x^2 - 25}{5x(x - 5)} = \frac{x^2 + 10x - 25}{5x(x - 5)}$$.

Ответ: $$\frac{x^2 + 10x - 25}{5x(x - 5)}$$