# Annuity notation in LaTeX

How do you write this in LaTeX:

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Start here: How to look up a math symbol –  Alan Munn Aug 5 '11 at 20:01

In the thread Actuarial & Annuity notation in LaTeX from text.comp.tex, Donald Arseneau provided the following \annu command:

\def\annu#1{_{%
\vbox{\hrule height .2pt
\kern 1pt
\hbox{$\scriptstyle {#1}\kern 1pt$}%
}\kern-.05pt
\vrule width .2pt
}}


Tweak ".2pt" and "1pt" for appearance.

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But you cant do it on this site? –  annuitt Aug 6 '11 at 6:56
@ annuitt Can't do what on this site? You now have two solutions to your problem on this site. (Or do you mean why LaTeX markup isn't converted on this site? If that's your question, it's because this site is mainly about the markup language (TeX/LaTeX) and having automatic conversion would defeat the purpose.) See this question Can we turn off math-tex for reasons. –  Alan Munn Aug 6 '11 at 16:47
+1 for the lifecon package mentioned there. –  mbork Aug 5 '11 at 23:15