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F x x2 2x 1

F x x2 2x 1F x x2 2x 1F x x2 2x 1F x x2 2x 1F x x2 2x 1F x x2 2x 1F x x2 2x 1F x x2 2x 1F x x2 2x 1F x x2 2x 1F x x2 2x 1F x x2 2x 1F x x2 2x 1F x x2 2x 1F x x2 2x 1F x x2 2x 1F x x2 2x 1F x x2 2x 1F x x2 2x 1F x x2 2x 1F x x2 2x 1F x x2 2x 1F x x2 2x 1F x x2 2x 1F x x2 2x 1F x x2 2x 1F x x2 2x 1F x x2 2x 1F x x2 2x 1F x x2 2x 1F x x2 2x 1F x x2 2x 1F x x2 2x 1F x x2 2x 1F x x2 2x 1F x x2 2x 1F x x2 2x 1F x x2 2x 1F x x2 2x 1F x x2 2x 1F x x2 2x 1F x x2 2x 1F x x2 2x 1F x x2 2x 1F x x2 2x 1F x x2 2x 1F x x2 2x 1F x x2 2x 1