4 X 6 = - 24, 3 X 3 = - 9, 2 X 5 = - 10, 4 X 5 = - 20, 5 X 7 = - 35, 2 X 8 = - 16, 2 X 9 = - 18, 3 X 9 = - 27, 4 X 7 = - 28, 5 X 9 = - 45,

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