1 \documentclass{article}
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16 \framebox[.65\columnwidth]{D}
20 \begin{equation}\label{e:barwq}\begin{split}
21 H_c&=\frac{1}{2n} \sum^n_{l=0}(-1)^{l}(n-{l})^{p-2}
22 \sum_{l _1+\dots+ l _p=l}\prod^p_{i=1} \binom{n_i}{l _i}\\
23 &\quad\cdot[(n-l )-(n_i-l _i)]^{n_i-l _i}\cdot
24 \Bigl[(n-l )^2-\sum^p_{j=1}(n_i-l _i)^2\Bigr].
25 \kern-2em % adjust equation body to the right [mjd,13-Nov-1994]
26 \end{split}\end{equation}