HP F2226A - 48GII Graphic Calculator User Manual page 72

To recover the larger-font display, press the @BIG C soft menu key once more.
Evaluating the expression
To evaluate the expression (or parts of the expression) within the Equation
Writer, highlight the part that you want to evaluate and press the @EVAL D
soft menu key.
For example, to evaluate the entire expression in this exercise, first, highlight
the entire expression, by pressing ‚ '. Then, press the @EVAL D soft
menu key. If your calculator is set to Exact CAS mode (i.e., the _Approx
CAS mode is not checked), then you will get the following symbolic result:
If you want to recover the unevaluated expression at this time, use the function
UNDO, i.e., ...¯(the first key in the third row of keys from the top of the
keyboard). The recovered expression is shown highlighted as before:
If you want a floating-point (numerical) evaluation, use the NUM function
(i.e., ...ï). The result is as follows:
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