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OpenStudy (anonymous):
Expand. 8 E (4n-1) N=1
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OpenStudy (studygurl14):
(4(1) - 1) + (4(2) - 1) + (4(3) - 1) + (4(4) - 1) + (4(5) - 1) + (4(6) - 1) + (4(7) - 1) + (4(8) - 1) (4 - 1) + (8 - 1) + (12 - 1) + (16 - 1) + (20 - 1) + (24 - 1) + (28 - 1) + (32 - 1) 3 + 7 + 11 + 15 + 19 + 23 + 27 + 31
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