8b(3b-2)-(b+5)(b-2)= 24b²-16b-(b²-2b+5b-10)=24b²-16b-b²-3b+10=23b²-19b+10
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8b(3b-2)-(b+5)(b-2)= 24b²-16b-(b²-2b+5b-10)=24b²-16b-b²-3b+10=23b²-19b+10