4x + 3y + 1, 4x - 3y - 1, 6x + 3y + 1, 6x - 3y - 1, 5x – 3y + 1, 5x + 3y - 1, 4x - 3y - 2, 4x + 3y + 2, 4b2 + 3c, 4b2 - 3c, 4x - 3y + 2, 4x + 3y - 2, 2x2 – 3y – 5, 2x2 + 3y + 5.

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