HP 49g+ - Manual (Page 53)

Page 2-20
To activate the ORDER command we press the C(@ORDER) soft menu key.
References
For additional information on entering and manipulating expressions in the
display or in the Equation Writer see Chapter 2 of the calculator’s User’s
Guide. For CAS (Computer Algebraic System) settings, see Appendix C in
the calculator’s User’s Guide. For information on Flags see, Chapter 24 in the
calculator’s User’s Guide.