Hello there,

There are two ways that I know of to define functions in maple:

f(x) :=      (1)

and 

f := x->     (2)

The issue that I'm noticing is that if I only use one method, everything works as I expect it to, but if I use both methods in the same document on a function with the same name eg. (doing f :=x->2x and then later in the document doing f(x) := 5x), (2) seems to completely overrule anything (1) says, even if (1) is used after. 
Can anyone explain why this is?