Solve 5*i - 14 = u, 7*i - 6*i = -4*u - 14 for u.
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What is the v'th term of 18, 58, 130, 246, 418?
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What is the l'th term of 19, 38, 57?
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What is the s'th term of -23, -5, 11, 25, 37, 47?
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What is the g'th term of -323, -325, -327?
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What is the d'th term of 11, 4, -17, -58, -125, -224, -361, -542?
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What is the z'th term of 221, 223, 225, 227, 229, 231?
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