5 Unit Expressions

• Operators: The usual arithmetic operators, with a few extras
• Sums and Differences of Units: Adding and subtracting units
• Numbers as Units: A number is a dimensionless unit
• Built-in Functions: Trigonometric functions, logarithms, roots
• Previous Result: Inserting the result of the previous conversion
• Complicated Unit Expressions: A complicated example
• Backwards Compatibility: Alternate behavior for ‘*’ and ‘-’