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One of the most useful thing in 'real' latex and not just this forum implementation og the math is defining new comands. that new you just define your bra and kets:
\newcommand{\ket}[1]{\, |#1\rangle}
\newcommand{\bra}[1]{\langle #1 |\,}
[tex]\langle \phi|\land |\phi\rangle[/tex]
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