The following software should be available from the same distributor
as your copy of LaTeX2e. You should obtain at least the
graphics and tools collections in order to have all
the files described in LaTeX: A Document Preparation System. The
amsmath package (part
of amslatex and formerly known as
and babel are also mentioned in the list
of `standard packages' in section C.5.2 of that book.
amsmathpackage; it provides many commands for typesetting mathematical formulas of higher complexity. It is produced and supported by the American Mathematical Society and it is described in The LaTeX Companion.
graphicspackage which provides support for the inclusion and transformation of graphics, including files produced by other software. Also included, is the
colorpackage which provides support for typesetting in colour. Both these packages are described in LaTeX: A Document Preparation System.