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c in (-oo:+oo)
3/4-(c/8) < 1/2 // - 1/2
3/4-(c/8)-(1/2) < 0
3/4-(c/8)-1/2 < 0
1/4-1/8*c < 0 // - 1/4
-1/8*c < -1/4 // : -1/8
c > -1/4/(-1/8)
c > 2
c in (2:+oo)
(2:+oo)
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