HP 50g Graphing Calculator - Manual (Page 838)

Page F-6
This operation is equivalent to the keystroke sequence „´. The MTH
menu is introduced in Chapter 3 (real numbers). Other functions from the MTH
menu are presented in Chapters 4 (complex numbers), 8 (lists), 9 (vectors), 10
(matrix creation), 11 (matrix operation), 16 (fast Fourier transforms), 17
(probability applications), and 19 (numbers in different bases).
CAS menu..
Selecting option 11.CAS menu.. in the APPS menu produces the CAS or
SYMBOLIC menu:
This operation is also available by pressing the Pkey. The CAS or
SYMBOLIC menu is introduced in Chapter 5 (algebraic and arithmetic
operations). Other functions from the CAS menu are presented in Chapters 4
(complex numbers), 6 (equations solutions), 10 (matrix creation), 11 (matrix
operation), 13 (calculus), 14 (multivariate calculus), and 15 (vector analysis).
Equation Library
Selecting option 12.Equation Library in the APPS men displays the EQ LIBRARY
MENU. From here you can press
!EQLIB! and then !EQNLI! to open the Equation
Library: