c - 6 ≤ 0 or c - 1 ≥ 8
6 is subtracting on the left of the first expression, then it will add on the right
1 is subtracting on the left of the second expression, then it will add on the right
c ≤ 0 + 6 or c ≥ 8 + 1
c ≤ 6 or c ≥ 9
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