Solve -8*r - 2*a = -13*r + 41, 2*r - a - 17 = 0 for r.
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What is the j'th term of 209, 197, 171, 125, 53?
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What is the p'th term of 15, 14, 7, -6, -25?
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What is the i'th term of -5, -4, -3, -2?
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What is the x'th term of 35, 62, 75, 68, 35?
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What is the s'th term of 4, 11, 18, 25, 32?
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What is the v'th term of -77, -154, -231?
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