seems mathematical symbols are not recognized in the conversion process. isn't one of the the aims of epub3 to include support for math symbols? even so, if the mobi format isn't updated to support it, you'll never see it in a mobi file. i heard that the kf8 format is closer to epub in that it supports css. since the kindle paperwhite supports kf8 in the form of an azw3 file, there may be hope for the kindle to display non-standard characters.
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