Timothy Murphy asked:
> I would have thought amsmath had align/gather etc
> for every conceivable situation.
> What exactly do you mean by lining up "parts of equations"?
The chapter was one explaining how to work out square roots, and it had
displayed fractions w/ varying numbers of digits, and I was trying to
get (say) a three digit fraction on the first page lined up with a four
digit fraction w/ two blank columns after it on the last page,
something like: