Quite honestly, I have no idea to what these numbers are referring. Is there any guidance from the text? Preface material? Is this a method book?
I think the way you have handled it is pretty good. The only thing different you need to do is precede the negative numbers with a word sign indicator. Otherwise they don’t read as numbers, but as some strange combination of intervals. I also don’t think you need all the music asterisks nor the music parentheses. One TN at the first instance would suffice, explaining how you are treating the numbers. After that, they should be aware of them as they come along. But you definitely need the word sign indicators before each one.
Hope that helps!
Kathleen