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c in (-oo:+oo)
1/298-c < 7.5 // - 7.5
1/298-c-7.5 < 0
-c-7.4966443 < 0
-c < 7.4966443 // * -1
c > -7.4966443
c in (-7.4966443:+oo)
(-7.4966443:+oo)
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