last time I looked into digitalizing books to go on Kindle platform or similar (such as sold on amazon) then it caused errors with formulas. It has been a well known problem for books with equations I think. Pdf file method works fine, but mot electronic book platforms do not do pdf.
anyone know if this has been improved in recent years?
and when will someone make a nice live-math book format, where one on touch screen or by voice can input numbers in equations and get results out.