pan class="special">::</span><span class="identifier">cpp_dec_float_50</span></code>
          (an arbitrary 50 decimal digits precision type), then we can write:
        </p>
<pre class="programlisting"> <span class="keyword">using</span> <span class="keyword">namespace</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">multiprecision</span><span class="special">;</span>

 <span class="identifier">negative_binomial_distribution</span><span class="special">&l