= 4(cos 30)² - 2cos 120 + √27tg 120 = 4*3/4 + 2sin 30 - √27ctg 30 = 3 + 1 - 9 = -5
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= 4(cos 30)² - 2cos 120 + √27tg 120 = 4*3/4 + 2sin 30 - √27ctg 30 = 3 + 1 - 9 = -5