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Plain ASCII is normally sufficient for almost all note taking. Exceptions
include scientific notes, which often require mathematical symbols and the
occasional formula. LaTeX^{121} is widely used to typeset scientific documents. Org mode
supports embedding LaTeX code into its files, because many academics are
used to writing and reading LaTeX source code, and because it can be
readily processed to produce pretty output for a number of export back-ends.

• LaTeX fragments: | Complex formulas made easy | |

• Previewing LaTeX fragments: | What will this snippet look like? | |

• CDLaTeX mode: | Speed up entering of formulas |

LaTeX is a macro system based on Donald E. Knuth’s TeX system. Many of the features described here as “LaTeX” are really from TeX, but for simplicity I am blurring this distinction.