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|| $n$ || Pentagonal Number || Additional dots || || 1 || 1 || || || 2 || 5 || $5-1$ || || 3 || 12 || $12-5$|| || 4 || 22 || $22-12$|| || 5 || ?? || ?? ||

When we go from the 4th to the 5th figure, how many more dots will we add?

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