A=(-8;3) B=<1;4>
AuB
AnB
A\B
B\A
AuB (-8,4>
AnB <1,3)
A\B (-8,1)
B\A<3,4>
AuB = (-8,4]
AnB = [1,3)
A\B = (-8,1)
B\A = [3,4]
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AuB (-8,4>
AnB <1,3)
A\B (-8,1)
B\A<3,4>
AuB = (-8,4]
AnB = [1,3)
A\B = (-8,1)
B\A = [3,4]