What is the b'th term of -8, -65, -160, -293, -464, -673, -920?
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What is the x'th term of 71, 83, 95, 107?
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What is the c'th term of 132, 134, 136?
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What is the f'th term of 25, 108, 247, 442?
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What is the z'th term of 90, 223, 356?
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What is the i'th term of 18, 31, 56, 99, 166?
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What is the t'th term of -4124, -4138, -4162, -4196?
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What is the t'th term of -61, -69, -79, -91?
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What is the o'th term of -663, -1326, -1989, -2652?
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What is the l'th term of 11, 14, 17, 20?
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What is the r'th term of -79, -99, -131, -181, -255?
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What is the s'th term of 105, 210, 311, 408, 501?
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What is the c'th term of 111, 204, 297, 390, 483, 576?
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