You need to OCR the book and then proofread it. And you'll have a lot of fun with the mathematical formulas. Best find an online formula editor that allows you to export png images of their output. There are some threads on that in the epub or workshop sub-forums. I don't have the time to search for them right now. If you're lucky, you might be able to take images of the formulas from your pdf file.
But brace yourself for a bit of work...
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