Answer:
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Step-by-step explanation:
I really dont know
Answer: 420
387420489
9^7: 4782969
9^2: 81
81 x 47 = 387420489
1, 7, 17, 31
2(1)² + 1 - 2 = 3-2 = 1
2(2)² + 1 - 2 = 9-2 = 7
2(3)² + 1 - 2 = 19-2 = 17
2(4)² + 1 - 2 = 33-2 = 31
EZZZZ
EX