remove non numeric characters from the beginning or end of a string (not the middle)

[RBF]

Hi!  

Regex question.  How can I remove non numeric characters from the beginning or end of a string (but not from the middle)?

e.g. before:

65x

2.5

si98

a99a

3-

I want the result to be:

65

2.5

98

99

3

This is important because I do not want to lose the decimals, e.g. 2.5 should not become 25

[aatalai]

@alexnajm very true, guess data celanese and then a formula tool with replace([field],"-","") assuming that's the only puncuatuion you would want to get rid of. 

[alexnajm]

Agreed @aatalai!