x1 x1 2x1 x1 2x1 2x2 3x2 x2 x2 x2 x3 x3 x3 2x3 x3 3x4 2x4
Chapter , Problem 49(choose chapter or problem)
x1 x1 2x1 x1 2x1 2x2 3x2 x2 x2 x2 x3 x3 x3 2x3 x3 3x4 2x4 3x4 x4 2x4 x5 x5 x5 x5 x5 3 3 6 2 3 x1 2x2
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