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plot points[(-5/2, 18),(-2, 14),(-1, 39/10),(0, 1/2),(1, 19/10),(2, 5),(5/2, 17/2)]
plot points[(-5/2, 18),(-2, 14),(-1, 39/10),(0, 1/2),(1, 19/10),(2, 5),(5/2, 17/2)]
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