[−2,3⟩[-2,3\rangle[−2,3⟩
R\[−2,3⟩\mathbf{R} \backslash[-2,3\rangleR\[−2,3⟩
{−2,−1,0,1,2}\{-2,-1,0,1,2\}{−2,−1,0,1,2}
⟨−∞,−2]∪⟨3,∞⟩\langle-\infty,-2] \cup\langle 3, \infty\rangle⟨−∞,−2]∪⟨3,∞⟩
1 bod
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