The students in my upper-level electrodynamics course are taking their final exam right now, which always reminds me of the time I told my students they could bring a formula sheet to the final exam as long as it was on one side of a piece of paper.
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I would have grabbed a role of un-perforated paper towels used in bathrooms and wrote it down on a long sheet. Or, if i was super lazy- trick a printer to print the textbook onto said paper(not sure the latter would work depending on the printer in question, due to the sensors).
