I have several class notes (more like books summarizing the material) that my college professors have provided in PDF form. As reading on a computer screen isn't exactly easy on the eyes (and gobbles unnecessary power compared to my Kindle) I'm looking for a way to convert these well. It would also be nice to be able to read/study in places where having a laptop would be impractical (e.g. weekend trips to places with no electricity provided, train travel).
I have already tried multiple file converters, including zamzar and Calibre, and the quality of both is no improvement on reading on a computer screen. I either receive gibberish (particularly when it comes to mathematical formulas) or else strange line breaks that make it difficult to follow the flow of the text, or both. This doesn't help the fact that I have to concentrate more anyways as the texts are not in my native language (I'm studying abroad in Germany). Reading pdfs on my Kindle is also not a viable option, as the constant moving back and forth over the page breaks my concentration as well.
I remember reading somewhere that converting to HTML, cleaning the code, and then converting to epub/mobi was suggested, but I can't find the article again and I wasn't sure what to do after converting the pdf to html (which seemed to work decently, and the HTML version looks good enough in my browser, besides small, rare garbled parts where certain mathematical symbols or special characters were, which I could live with and aren't of importance for non-math courses anyways). I would also be open to other roundabout ways of conversion (over an Open Office/Word text document, for instance) as long as the quality is good and easily readable.
As a student my budget doesn't really include commercial optical character recognition software. Can anyone help with this issue?