It is not real clear if the sub-itemization in this exercise material are subdivisions or if they should stay inline. If treated as subdivisions as in 7.18 (i.e.: 1-5, 3-5), should we omit the semicolons separating them in the text.
Follow print. Since the print copy does not list each lettered item on a new line, you should do the same. (Nemeth Code does not address this format.)
I notice that the print copy has left (c) alone at the end of line 5. Personally, I would be sure each letter is on the same line as the math expression which follows it (or at least one word of the sentences in #30.) There is no rule stating this preference, however, just to be clear.
Regarding the semicolons, you need to include them. Transcribers don't have the option of editing the text.