Merge Three Regexes into One (or Two) - regex

Question

I would like to merge my three regexes which clean text (empty lines, leading and trailing spaces etc.) into, if possible, one regex, or if it is not possible - into two.
My first regex is [ \t]+. It does this sort of cleaning.
My second regex is ^(?:[\t ]*(?:\r?\n|\r))+ Not image included since it won't catch anything if the previous regex has not run.
The third regex is ^[\s\xA0]+|[\s\xA0]+$. It does this sort of cleaning.
EDIT: I have forgotten to mention that in each case I replace match with nothing "".
EDIT 2: I use the following code in Word:
With selection
Dim RegEx As Object
Set RegEx = CreateObject("VBScript.RegExp")
RegEx.Global = True
RegEx.MultiLine = True
' clean selection
RegEx.Pattern = "[ \t]+"
.Text = RegEx.Replace(.Text, " ")
RegEx.Pattern = "^(?:[\t ]*(?:\r?\n|\r))+"
.Text = RegEx.Replace(.Text, "")
' the following is from http://stackoverflow.com/a/24049145/2657875
RegEx.Pattern = "^[\s\xA0]+|[\s\xA0]+$"
.Text = RegEx.Replace(.Text, "")
End With

Answer 1

The last regexps can be merged as
RegEx.Pattern = "^(?:[\t ]*(?:\r?\n|\r)?)*|[ \t]+$"
I do not think there can be a chance to merge all 3 in VBA since you are using two different replacement patterns.

Answer 2

If i am not wrong, you want all your lines/spaces/tabs/white lines to be matched and removed, so you could merge the input strings. Well, that's easy and can be done if you do use the following regex in your replace program/script/command:
/([\s\t]{0,50}\r?\n)+|\s+/s
The regex should work well on windows as well as linux based files.

Answer 3

Not pro but I use multiple regex one after another. If you are not familiar with below code than you should try.
Set regEx_ = new regExp
With regEx_
.Global = True
.MultiLine = True
.IgnoreCase = True
.Pattern = "Pattern 1"
TextLine = regEx_.replace(TextLine, "")
.Pattern = "Pattern 2"
TextLine = regEx_.replace(TextLine, "")
'and so on
End With