This is documentation for Mathematica 2, which was
based on an earlier version of the Wolfram Language.
View current documentation (Version 11.1)

2.1 Expressions

PDF files:
2.1.1 Everything Is an Expression
2.1.2 The Meaning of Expressions
2.1.3 Special Ways to Input Expressions
2.1.4 Parts of Expressions
2.1.5 Manipulating Expressions Like Lists
2.1.6 Expressions as Trees
2.1.7 Advanced Topic: Levels in Expressions

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