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How do I evalutate \begin{equation} \sum_{r=1}^{n} [r(r+1)(r+2)(r+2)] \end{equation}?

As clear from the title itself, I need to evaluate:

\begin{equation} \sum_{r=1}^{n} [r(r+1)(r+2)(r+2)] \end{equation}

But I don't know where to start.

Can someone possibly give a hint??