HP 49g Graphing Calculator - Manual (Page 141)

EULER
Type: Function
Description: For a given integer, retimrs the niunber of integers less
than the integer that are co-prime with the integer.
(Euler’s 4> fimction.)
Access: RiliTH)
INTEGER
Input: A non-negative integer.
Output: The number of positive integers, less than, and co-prime
with, the integer.
Flags: Exact mode must be set (flag -105 clear).
Numeric mode must not be set (flag -03 clear).
EXLR
Type: Command
Description: Returns the left- and right-hand sides of an equation as
discrete expressions.
Access: Catalog, (Rf)
Input: An equation.
Output: Level 2/Ai'gument 1: Tire expression to the left of the “=”
sign in the original equation.
Level 1/Argument 2: The expression to the right of the
sign in the original equation
Flags: Exact mode must be set (flag -105 clear).
Numeric mode must not be set (flag -03 clear).
Example: Split the following equation into its two component
expressions:
sin(.r)=5a'+?/
Command: E X L R ( S I N ( X ) = 5 * X + Y )
Result: { S I N ( X ) 5 * X + Y ]
Page 14-18 Computer Algebra Commands