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x in (-oo:+oo)
x-(3/(-2)) < 4 // - 4
x-(3/(-2))-4 < 0
x+3/2-4 < 0
x-5/2 < 0 // + 5/2
x < 5/2
x in (-oo:5/2)
(-oo:5/2)
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