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k in (-oo:+oo)
5*k-(2/(-8)) > 2 // - 2
5*k-(2/(-8))-2 > 0
5*k+1/4-2 > 0
5*k-7/4 > 0 // + 7/4
5*k > 7/4 // : 5
k > 7/4/5
k > 7/20
k in (7/20:+oo)
(7/20:+oo)
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