# Error while running code containing equation

\underline{y}={(y_{111}&plus;y_{112}&plus;...&plus;y_{ijk})}^{T}


! Missing $inserted. $
l.97 ...i, B = j, C = k and let \underline{y}={(y_
{111}&plus;y_{112}&plus;.....

• Welcome to TeX.SX. This fragment of code isn't very useful. Apparently you have forgottten \begin{align}...\end{align} around the equation, but this is only a guess -- without any further information – user31729 Dec 27 '15 at 17:21
• try remove braces ={ end}^ – touhami Dec 27 '15 at 17:25
• @ChristianHupfer, I don't know much about latex. Should we start an equation with \begin{align}? – User235 Dec 27 '15 at 17:46
• as @ChristianHupfer said with this one line of code we can not do any thing helpful. – touhami Dec 27 '15 at 17:52
• @Sana, ideally, post a minimal example, which is basically your whole document, but stripped down to the actual problem you're encountering. – Turion Dec 27 '15 at 18:26

Not really sure if this is the output you are looking for, but here is my interpretation:

\documentclass[11pt]{article}
\usepackage{amsmath}
\begin{document}
Foo bar baz. Foo bar baz. Foo bar baz. Foo bar baz. Foo bar baz. Foo bar baz. Foo bar baz. %
$\underline{y}=(y_\mathrm{111}+y_\mathrm{112}+\dots +y_\mathrm{ijk})^{T}$ %
Foo bar baz. Foo bar baz. Foo bar baz. Foo bar baz. Foo bar baz. Foo bar baz. Foo bar baz.
\end{document}


• You do know that plus; does look strange, don't you? ;-) – user31729 Dec 27 '15 at 17:47
• @ChristianHupfer, I want an output which somewhat resembles the above stated one except that instead of plus i want + sign and excluding the ; symbol. – User235 Dec 27 '15 at 17:56
• And also I am writing this equation within a sentence. – User235 Dec 27 '15 at 17:57
• @Sana: runartrollet tried to make working code out of your fragment of non-working, er, say, 'code'. + and - are possible in LaTeX directly, there's no need of writing plus (apart from being wrong anyway here). You've shown a one-liner of code which does not reveal really what you want to achieve. – user31729 Dec 27 '15 at 17:59
• Then you probably like to write some text $\underline{y}=(y_{111} + y_{112} + \dots + y_{ijk})^{T}$ and more text (based on guessing). It seems that you need to read some basic introduction to the LaTeX. – Zarko Dec 27 '15 at 18:16