\[\in\]
\[\notin\]
⊆
⊂
{\(x_1\), \(x_2\), ...}
{\(x\) : ...}
\(n\) (\(A\))
\[\emptyset\]
ε
\[A^ ′ \]
\[N\]
\[Z\]
\[Z^+\]
\[Z^+_0\]
\[R\]
\[Q\]
\[\cup\]
\[\cap\]
(\(x\), \(y\))
[\(a\), \(b\)]
[\(a\), \(b\))
(\(a\), \(b\)]
(\(a\), \(b\))
