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A LaTeX command begins with the command name, which consists of a \ followed by either (a) a string of letters or (b) a single non-letter. Arguments contained in square brackets [] are optional while arguments contained in braces {} are required.
Note: LaTeX is case sensitive. Enter all commands in lower case unless explicitly directed to do otherwise.
LaTeX environments are created by
\begin{environment} ... \end{environment}
Declarations can be effected by an environment of the same name.
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