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13.2. Preparing a formula with TeX

If you prefer to use Plain TeX, here is the same example in that notation.

% math.tex: Sample of TeX math for inclusion in DocBook
%
\hsize=6in
\nopagenumbers
$$\int \tanh^{-1}{x\over a}dx =
  x \tanh^{-1}{x\over a}+{a\over 2}\log(a^2-x^2),\qquad
    \left(\left| x\over a \right| < 1\right)
  \leqno{(14)}
$$
\bye