2

please help me breaking this equation into two lines.

Q_2(T,V)=V^2\left[1+\left( \frac{3}{2}\right)\left( \frac{2R_1}{3\epsilon}
F\left(\frac{3}{2},\frac{1}{2},\frac{5}{2};\frac{-R_1^2}{\epsilon^2}\right) 
+ \frac{2R_1}{3\epsilon}\frac{\alpha^2 B}{\epsilon^4}
F\left(\frac{3}{10},\frac{1}{2},\frac{3}{10};\frac{-R_1^{10}}{\epsilon^{10}}\right)\right)
\left(\frac{F_0}{R_1T} \right)^3\right]
1
  • 2
    Welcome to TeX.SE! Please extend your code fragment to complete small document beginning with \documentclass ... and ending with \end{document}.
    – Zarko
    Jul 1, 2020 at 14:57

2 Answers 2

7

You can't have a line-break inside a \left ... \right group. I would like to suggest that you first replace all instances of \left with \biggl and all instances of \right with \biggr. Then it's up to you to decide whether an align* or a multline* environment is more appropriate.

enter image description here

\documentclass{article} % or some other suitable document class
\usepackage{amsmath} % for 'align*' and 'multline*' environments
\begin{document}
\noindent
With \verb+align*+:
\begin{align*}
Q_2(T,V)=V^2\biggl[ 1+ \frac{3}{2}\biggl\{ 
& \frac{2R_1}{3\epsilon} 
F\biggl(\frac{3}{2},\frac{1}{2},\frac{5}{2};
  \frac{-R_1^2}{\epsilon^2}\biggr) \\
&+ \frac{2R_1}{3\epsilon}\frac{\alpha^2 B}{\epsilon^4}
F\biggl(\frac{3}{10},\frac{1}{2},\frac{3}{10};
  \frac{-R_1^{10}}{\epsilon^{10}}\biggr)
\biggr\} \biggl(\frac{F_0}{R_1T} \biggr)^{\!\!3}\, \biggr]
\end{align*}


\bigskip\noindent
With \verb+multline*+:
\begin{multline*}
Q_2(T,V)=V^2\biggl[ 1+ \frac{3}{2}\biggl\{ 
 \frac{2R_1}{3\epsilon} 
F\biggl(\frac{3}{2},\frac{1}{2},\frac{5}{2};
  \frac{-R_1^2}{\epsilon^2}\biggr) \\
+ \frac{2R_1}{3\epsilon}\frac{\alpha^2 B}{\epsilon^4}
F\biggl(\frac{3}{10},\frac{1}{2},\frac{3}{10};
  \frac{-R_1^{10}}{\epsilon^{10}}\biggr)
\biggr\} \biggl(\frac{F_0}{R_1T} \biggr)^{\!\!3}\, \biggr]
\end{multline*}
\end{document}
4

One of possibilities is use of the multline math environment defined in amsmat package:

\documentclass{article}
\usepackage{amsmath}

\begin{document}
\begin{multline*}
Q_2(T,V) = V^2g
    \Biggl[1+\left( \frac{3}{2}\right)
    \Biggl(\frac{2R_1}{3\epsilon}F
    \left(\frac{3}{2},\frac{1}{2},\frac{5}{2};\frac{-R_1^2}{\epsilon^2}\right)  \\
    + \frac{2R_1}{3\epsilon}\frac{\alpha^2 B}{\epsilon^4}F
        \left(\frac{3}{10},\frac{1}{2},\frac{3}{10};\frac{-R_1^{10}}{\epsilon^{10}}\right)
    \Biggr)
        \left(\frac{F_0}{R_1T} \right)^3
    \Biggr]
\end{multline*}
\end{document}

enter image description here

4
  • Are you sure about using \Big to size the "outer" pair of parentheses?
    – Mico
    Jul 1, 2020 at 15:23
  • @Mico, this is typing error. Corrected now.
    – Zarko
    Jul 1, 2020 at 15:26
  • Thanks. (I've already upvoted your answer, BTW.)
    – Mico
    Jul 1, 2020 at 15:28
  • @Mico, thank you very much! I do the same (just now).
    – Zarko
    Jul 1, 2020 at 15:30

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