 P(N)(X) at X.
        </li>
        <li>
          <b>LEGENDRE_POLY_COEF</b> evaluates the Legendre polynomial coefficients.
        </li>
        <li>
          <b>LEGENDRE_POLY_VALUES</b> returns values of the Legendre polynomials.
        </li>
        <li>
          <b>LEGENDRE_SYMBOL</b> evaluates the Legendre symbol (Q/P).
        </li>
        <li>
          <b>LERCH</b> estimates the Lerch transcendent function.
        </li>
        <li>
          <b>LERCH_VALUES</b> returns some values of the Ler