27a3 - 8b3 b2 - b - 6 # bc - b - 3c + 3 3ac - 2bc - 3a + 2b
Chapter 6, Problem 70(choose chapter or problem)
27a3 - 8b3 b2 - b - 6 # bc - b - 3c + 3 3ac - 2bc - 3a + 2b
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