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[" 5."3tan^(6)((pi)/(18))-27tan^(4)((pi)...

[" 5."3tan^(6)((pi)/(18))-27tan^(4)((pi)/(18))+33tan^(2)((pi)/(18))" equals."],[[" (a) "0," (b) "1," (c) "2," (d) "3]]

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