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Cos 2x 1 3Cos 2x 1 3Cos 2x 1 3Cos 2x 1 3Cos 2x 1 3Cos 2x 1 3
Cos 2x 1 3Cos 2x 1 3Cos 2x 1 3Cos 2x 1 3Cos 2x 1 3Cos 2x 1 3
Cos 2x 1 3Cos 2x 1 3Cos 2x 1 3Cos 2x 1 3Cos 2x 1 3Cos 2x 1 3Cos 2x 1 3Cos 2x 1 3Cos 2x 1 3Cos 2x 1 3Cos 2x 1 3Cos 2x 1 3Cos 2x 1 3Cos 2x 1 3Cos 2x 1 3Cos 2x 1 3Cos 2x 1 3Cos 2x 1 3Cos 2x 1 3Cos 2x 1 3Cos 2x 1 3Cos 2x 1 3Cos 2x 1 3Cos 2x 1 3Cos 2x 1 3Cos 2x 1 3Cos 2x 1 3Cos 2x 1 3Cos 2x 1 3Cos 2x 1 3Cos 2x 1 3Cos 2x 1 3Cos 2x 1 3Cos 2x 1 3Cos 2x 1 3Cos 2x 1 3