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{1/3(2)3 + 3(2)2 - 2(2) } - {1/3(-1)+3(-1)2-2(-1)}
(8/3+12-4) - (-1/3+3+2)
= 6
= (1/3)(2)³ + 3(2)² - 2(2) - (1/3)(-1)³ + 3(-1)² - 2(-1)
= 8/3 + 12 - 4 + 1/3 - 3 - 2
= 12