Multi-Select Text Operators

I have a summary field (Multi-select text) in a table.  I then want to create another Formula Multi-Select Text field based on the summary Field.  I basically want to do something like the below, but not sure what the proper operators are for TextList fields

Split(List(";",
If([Channel Summary] = "Retail Sales and Distibution"), "Retail"),
If (Contains([Channel Summary],"Retail Sales and Distribution", "Tech Care - Mobility"), "Omni")
If(Does not contain([Channel Summary], "Retail Sales and Distribution", "Centers"))

I know how the Contains works but i'm not sure how to write "equals" or "does not contain"

Thanks,

Michael

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MICHAEL SARGENT
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