Solve 2*l + 3*u + 16 = 0, 107*u - 4 = -4*l + 110*u for l.
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What is the s'th term of 21, 189, 643, 1527, 2985, 5161, 8199, 12243?
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What is the n'th term of -24, -69, -130, -207?
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What is the a'th term of 1779, 1783, 1789, 1797, 1807?
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What is the f'th term of -155, -160, -169, -182, -199, -220?
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What is the g'th term of -43, -88, -135, -184, -235, -288?
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What is the u'th term of -44, -41, -44, -59, -92, -149, -236?
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