Here is the code to do the non-Greek and non-operator content. I'll leave it to you to do the rest.
Code:
Sub Demo()
Application.ScreenUpdating = False
With ActiveDocument.Range
With .Find
.ClearFormatting
.Replacement.ClearFormatting
.Text = "[!\<-\>\^÷" & AscW(&H374) & "-" & AscW(&H3E1) & _
AscW(&H2C2) & "-" & AscW(&H2C7) & _
AscW(&H1F00) & "-" & AscW(&H1FEE) & _
AscW(&H2044) & "-" & AscW(&H208E) & _
AscW(&H2202) & "-" & AscW(&H2265) & "]"
.Replacement.Text = ""
.MatchWildcards = True
.Format = True
.Forward = True
.Wrap = wdFindContinue
.Font.Bold = False
.Font.Italic = True
.Font.Subscript = False
.Font.Superscript = False
.Replacement.Style = "cItalic"
.Execute Replace:=wdReplaceAll
.Font.Subscript = True
.Font.Superscript = False
.Replacement.Style = "cIsub"
.Execute Replace:=wdReplaceAll
.Font.Subscript = False
.Font.Superscript = True
.Replacement.Style = "cIsup"
.Execute Replace:=wdReplaceAll
.Font.Bold = True
.Font.Italic = False
.Font.Subscript = False
.Font.Superscript = False
.Replacement.Style = "cBold"
.Execute Replace:=wdReplaceAll
.Font.Subscript = True
.Font.Superscript = False
.Replacement.Style = "cBsub"
.Execute Replace:=wdReplaceAll
.Font.Subscript = False
.Font.Superscript = True
.Replacement.Style = "cBsup"
.Execute Replace:=wdReplaceAll
.Font.Bold = True
.Font.Italic = True
.Font.Subscript = False
.Font.Superscript = False
.Replacement.Style = "cBI"
.Execute Replace:=wdReplaceAll
.Font.Subscript = True
.Font.Superscript = False
.Replacement.Style = "cBIsub"
.Execute Replace:=wdReplaceAll
.Font.Subscript = False
.Font.Superscript = True
.Replacement.Style = "cBIsup"
.Execute Replace:=wdReplaceAll
.Font.Bold = False
.Font.Italic = False
.Font.Subscript = True
.Font.Superscript = False
.Replacement.Style = "cSub"
.Execute Replace:=wdReplaceAll
.Font.Subscript = False
.Font.Superscript = True
.Replacement.Style = "cSup"
.Execute Replace:=wdReplaceAll
.ClearFormatting
.Font.AllCaps = True
.Font.SmallCaps = False
.Replacement.Style = "cAllCaps"
.Execute Replace:=wdReplaceAll
.Font.AllCaps = False
.Font.SmallCaps = True
.Replacement.Style = "cSmCap"
.Execute Replace:=wdReplaceAll
End With
End With
Application.ScreenUpdating = True
End Sub