Illegal parameter number in definition of Hy@tempa.

This is probably a pretty much prehistoric error - this problem is caused by unescaped hash symbols, #, in URLs.

To fix:

• Escape the hash with a backslash, \#, as in "http://blah.com/.../page\#anchor"
• Remove the offending character

Missing $ inserted.

This usually happens when you have, for instance, used an underscore _ in a non-mathematical environment and left the parser confused about what it means. Try escaping characters like this via \_ and see if this fixes the problem.

Mysterious LaTeX Errors

LaTeX's power comes with an amazing array of weird and wonderful errors - here are some I found

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