Without seeing your text, I cannot say whether it is partially or totally technical. Please see section 4 of the Nemeth Code in order to determine what type of text you are dealing with. Part b of section 4 may be particularly helpful. (A PDF scan of the Nemeth Code is available here: http://brailleauthority.org/mathscience/nemeth1972.pdf [Please note that this PDF does not include any of the updates to the Nemeth Code, which are available here: http://brailleauthority.org/mathscience/math-science.html%5D)
If your text is totally technical, then the document Application of the Formats Guidelines to Nemeth Transcriptions will likely be helpful.
Does that help to clarify the issue?