Explanation:
(2×8² - 2²×8)/(2×8)
before we start typing things into the calculator, we see that the fraction can be simplified :
(2×8² - 2²×8)/(2×8) | divide top and bottom by 2
(8² - 2×8)/8 | divide top and bottom by 8
(8 - 2)/1 = 6/1 = 6
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