/*
   This is a second test of the |HWEB| system of documentation.
   The compiler ought to produce some nice HTML code for
   this example as well.

   Consider the equation $Ax + By + C = 0$, with $(A,B,C)$ our
   independent variables.  Suppose we have two points on this line;
   call them $(x1, y1)$ and $(x2,y2)$.  We want to find a number
   of other points $xi$ and $y_i$ on this line.  We can do this
   by solving the magic equation
   $
       xi^n + y_i^n = Z^n
   $
   for some magic $Z$.  It might also help to consider $u = \sin x$
   rather than simply $x$, I dunno.
*/