rns the region type for problem 29.
        </li>
        <li>
          <a href = "p29_title.m">p29_title.m</a>, 
          prints a title for problem 29.
        </li>
        <li>
          <a href = "p30_default.m">p30_default.m</a>, 
          sets default values for problem 30.
        </li>
        <li>
          <a href = "p30_exact.m">p30_exact.m</a>, 
          sets the exact integral for problem 30.
        </li>
        <li>
          <a href = "p30_f.m">p30_f.m</a>, 
          evaluates the int