HP 33s User Manual page 100

To edit an equation you're typing:
~
1. Press repeatedly until you delete the unwanted number or function.
If you're typing a decimal number and the "_" digit–entry cursor is on,
deletes only the rightmost character. If you delete all characters in the number,
the calculator switches back to the "  " equation–entry cursor.
If the "  " equation–entry cursor is on, pressing
number or function.
2. Retype the rest of the equation.
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3. Press
To edit a saved equation:
1. Display the desired equation. (See "Displaying and Selecting Equations"
above.)
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2. Press (once only) to start editing the equation. The "  " equation–entry
cursor appears at the end of the equation. Nothing is deleted from the
equation.
~
3. Use to edit the equation as described above.
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4. Press
replacing the previous version.
To clear an equation you're typing:
¹ ¡
Press
the equation list.
To clear a saved equation:
1. Display the desired equation. (See "Displaying and Selecting Equations"
above.)
¹ ¡
2. Press
To clear all equations, clear them one at a time: scroll through the equation list until
you come to    , press
each equation is displayed until you see    .
Example: Editing an Equation.
Remove 25 in the equation from the previous example.
6–8
Entering and Evaluating Equations
Å
(or ) to save the equation in the equation list.
Å
(or ) to save the edited equation in the equation list,
then press {  }. The display goes back to the previous entry in
. The display shows the previous entry in the equation list.
×
~
deletes the entire rightmost
¹ ¡
, then press
~
repeatedly as