For the function $\small{f(x) = x^{2}-5x}$, simplify each expression as much as possible.

1.	$\large{\frac{f(x \;+\; h) \;-\; f(x)}{h}}, \small{h \ne 0}:$
2.	$\large{\frac{f(w) \;-\; f(x)}{w \;-\; x}}, \small{x \ne w}:$