To align a long string of symbols I usually use

\begin{eqnarray*} ... \end{eqnarray*}.

I would like to know if there is any convenient alternative to this environment. For example, I know that

\[ ... \] 

can replace

$$ ... $$ and is more viable than

$$ ... $$.

What I am after is a simple alternative such that it is to

\begin{eqnarray*} ... \end{eqnarray*} 


\[ ... \] 

is to

$$ ... $$.

Actually, \[...\] is not a replacement or shorthand for $$...$$. It's preferred due to improved vertical spacing; see Why is \[\] preferable to $$$$?.

Also, eqnarray does not provide the best horizontal spacing around operators.

If shorthand is what you're after, then you could use \be...\ee as an alternative to \begin{eqnarray*}...\end{eqnarray*} where


I would not recommend it though.

Perhaps you're stuck on the notation used by eqnarray:

... & .. & ... \\
... & .. & ...

In that sense, you may be interested in using the following alternative that combines the preferred notation \[...\] with the use of eqnarray's double-&:

enter image description here


\newcommand{\ba}{% "\begin{eqnarray*}"
  \[% Start display math
    \renewcommand{\arraystretch}{1.4}% https://tex.stackexchange.com/q/31672/5764
    \begin{array}{@{}r@{}>{{}}c<{{}}@{}l@{}}% Start a 3-column array
\newcommand{\ea}{% "\end{eqnarray*}"
    \end{array}% End array
  \]% End display math


  f(x) &= ax^2 + bx + c \\
  g(x) &= ax^2 + bx + c

  f(x) &=& ax^2 + bx + c \\
  g(x) &=& ax^2 + bx + c


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