What is the sum of 3-4 × 3-178 + 10 × 3

3 -4 * 2 +10 * 3 = 21 = 7 * 3
The fourth power of 3 - 4 * 3 + 10 * 2 = 63 = 7 * 3 2
5 days - 4 * 3 ^ 4 + 10 * 3 = 189 = 7 * 3
...
The nth power of 3 ^ (n + 2) - 4 * 3 ^ (n + 1) + 10 * 3 ^ n = 7 * 3
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