4(c - 8) - 4c - 32, 3(2a - 1) - 6a - 3, a(2a + b) - 2a2 + 2b, 2a(4 - 3b) - 8a - 6ab, 2b (3b + 2a) - 6b2 +4ab, 3a (a -2b) - 3a2 - 6ab,

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