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Complete the following analogy.
3 $$\colon$$ 30 $$\colon\colon$$ 6 $$\colon$$ ? $$\colon\colon$$ 7 $$\colon$$ 346
Each number is related by $$n^3 + 3$$, as $$3^3 + 3 = 30$$ and $$7^3 + 3 = 346$$. So the missing number is $$6^3 + 3 = 219$$.
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