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X in (-oo:+oo)
X-X-(1/2)-(5/4) = 1/2 // - 1/2
X-X-(1/2)-(5/4)-(1/2) = 0
X-X-1/2-5/4-1/2 = 0
-9/4 = 0
X belongs to the empty set
X belongs to the empty set
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