Sub TestFun()
  MsgBox funExpandDashes("1-3,5,10-15")
End Sub

Function funExpandDashes(strPage As String) As String
  Dim arrOuter() As String, iMin As Integer, iMax As Integer, arrInner() As String, sExpand As String
  Dim x As Integer, y As Integer

  strPage = Replace(strPage, " ", "")     'make sure there are no spaces
  arrOuter = Split(strPage, ",")
  For x = LBound(arrOuter) To UBound(arrOuter)
    arrInner = Split(arrOuter(x), "-")
    If UBound(arrInner) > LBound(arrInner) Then
      sExpand = arrInner(0)
      For y = CInt(arrInner(0)) + 1 To CInt(arrInner(1))
        sExpand = sExpand & "," & y
      Next y
      arrOuter(x) = sExpand
    End If
  Next x
  funExpandDashes = Join(arrOuter, ",")
  End Function
  
  'Add code here to make sure order is increasing (ie sort array)
  Sub DeleteMultiplePages()

'Delete Multiple Pages by displaying Inputbox

  Dim objRange As range
  Dim strPage As String
  Dim objDoc As Document
  Dim nSplitItem As Long

  Application.ScreenUpdating = False
 
  ' Initialize and enter page numbers of pages to be deleted.
  Set objDoc = ActiveDocument
  strPage = InputBox("Enter the page numbers of pages to be deleted: " & vbNewLine & _
            "use comma to separate numbers", "Delete Pages", "For example: 1,3")
  nSplitItem = funExpandDashes

  ' Find specified pages and highlight their contents.
  For nSplitItem = nSplitItem To 0 Step -1
    With ActiveDocument
      Selection.GoTo What:=wdGoToPage, Which:=wdGoToAbsolute, Count:=Split(strPage, ",")(nSplitItem)
      Set objRange = .Bookmarks("\Page").range
      objRange.Delete
    End With
  Next nSplitItem
 
  Application.ScreenUpdating = True
End Sub

  'Add code here to remove duplicates
 
End Sub