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1. P(x) = x - 7x + 5

2. P(x) = 2x - 7x + 3

3. P(x) = 4x4 - 3x3 – x2 + 2x + 1

4. P(x) = 2x4 - 3x + 4x + 17x + 7

5. P(x) = 8x* + 12x – 10x2 + 3x + 27