# Math Formulae

There are three environments that put LaTeX in math mode:

`math`
  For Formulae that appear right in the text.
`displaymath`
  For Formulae that appear on their own line.
`equation`
  The same as the displaymath environment except that it adds an equation number in the right margin.

The `math` environment can be used in both paragraph and LR mode, but the `displaymath` and `equation` environments can be used only in paragraph mode. The `math` and `displaymath` environments are used so often that they have the following short forms:

        \(...\)     instead of     \begin{math}...\end{math}

        \[...\]     instead of     \begin{displaymath}...\end{displaymath}

In fact, the `math` environment is so common that it has an even shorter form:

        $ ... $     instead of     \(...\)

- Subscripts & Superscripts: Also known as exponent or index.
- Math Symbols: Various mathematical squiggles.
- Spacing in Math Mode: Thick, medium, thin and negative spaces.
- Math Miscellany: Stuff that doesn't fit anywhere else.

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