Method:

In mathematical mode: repeatedly enter "e" ("until you can't enter it (more than a dozen times).

X, quintic →, x, quintic→, x, thrice→, colon, Pol(X, 0).

3.Calc，"- 1 "，" = "

4. Continue to press "="

5.→

If so, continue. If not, it may not be genuine 99 1. ...

6.[SHIFT] [DEL]

7. Root number 3 Root number 3 Root number 3 Root number 3

8." = "and then collapse.

9. Press the ON key to start the machine. You will find a linear pattern.

10. Enter the formula with (e.g. 1 (1, "=").

1 1. The history entered in this mode can be called again when it is closed and opened. But because the design itself only has a history of 15, it only has 15.

12.[SHIFT]，[9](CLR)，[ 1]，=，=

13. This will return to the mathematical mode. Press ↑ to call history.

14. Use the left and right arrow keys to edit the formula, and you will get the required linear index. But it is extremely troublesome. You have to enter the formula in linear mode every time and then go back to mathematical mode to use it forcibly.

15. Why is it abnormal? If you put the number DEL to the left of the power symbol, a box will appear.

16. Everything is normal.

17. But if you delete the right power when you keep the box, there is only one box left.

18. If you move the cursor to the left of the box and press →, the cursor will be fixed. Although the input cannot be displayed at this time, you can directly overwrite the memory from the input area. It can even exceed the limit of 100 characters, and expand the input and history buffers to areas such as variables. For example, after I enter 233 1

19. Even M memory is full of "11...". (Decimal 1 becomes ASCII 3 1.

Anyway, something is wrong. This is not normal. ....

Forget it, stick to the old practical mathematical model. ...