Re: Looking for a way to insert formulas involving sums and integrals into a buffer

[Óscar Fuentes]

Dan Hitt <dan.hitt@gmail.com> writes:

> Using latex, you can easily write some random formula like
> \[
>     \int_a^b |f(t)|^2 dt = \sum_{j=0}^{\infty} \alpha_j^2
> \]
> After you convert the output dvi to pdf, it is easy to read.
>
> I would like to do something like this in an emacs buffer that has loads of
> other things in it, without much trouble.  Certainly i wouldn't want to
> have to do anything multi-stage (like running latex, or compiling a
> file).

[snip]

> The main requirement is that it be super-easy, without running additional
> processes, and the result should be easily transportable (via copy/paste)
> from buffer to buffer.

Take a look at org-mode:

https://orgmode.org/manual/LaTeX-fragments.html

Org-mode comes built-in with Emacs. The documentation you have installed
( accesible with C-h i ) corresponds to your version, so use them instead of 
the online
manual I linked to for reference.