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9 - 5 b - [ 2 a - b - \{ 3 a - 2 c - a + 2 b \} ] |
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Answer» 9-5b-[2a-b-3a+2c+a-2b]=9-5b-[-3b+2c]=9-5b+3b-2c=9-2b-2c |
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