In latex there is a problem with adding long equations to a paper. Suggestions like converting the equation to a figure first are more troublesome than any help. The physics journals have already implemented something called widetext and this is quite useful. That being said, this is a very simple feature. It exists, though guides are not quite useful.
Instructions are below ..
\usepackage{cuted}
\usepackage{flushend}\begin{strip}
Your equation (or even text} here!!
\end{strip}
When I use the \usepackage{cuted} my latex file breaks down. I get the message: Undefined control sequence appearing in various places among many other errors. After deleting the line " \usepackage{cuted} " everything compiles normally. I already updated Miktex and even updated the sttools bundle. Can't seem to figure out what's wrong.