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6x 2 6x 17 7x 2 8
6x 2 6x 17 7x 2 8 pictures 5
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6x 2
6x 2 6x 17 7x 2 8
6x 2 6x u2212 17 7x 2 u2212 8 discriminant
6x 2 6x 17 7x 2 8
