Rakshas' Scrapbook

aligning multi-line equations

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• aligned equation with a number on each line: the equation is aligned at the & character. this feels quite like a tabular environment.

  \begin{align}
  (a + b)^2 &= a^2 + 2ab + b^2 \\\
            &= b^2 + 2ba + a^2 \\\
            &= (b + a)^2 \\\
  \end{align}
  

• aligned equation with a single number:

  \begin{equation}
  \begin{split}
  (a + b)^2 &= a^2 + 2ab + b^2 \\\
            &= b^2 + 2ba + a^2 \\\
            &= (b + a)^2 \\\
  \end{split}
  \end{equation}