If an error message (like “Math ERROR” or “Syntax ERROR”) appears when you press =, press dor e. This will display the part of the calculation where the error occurred, with the cursor positioned at the error location. You can then make necessary corrections.
Example: When you input 14 ⎟ 0 ⋅ 2 = by mistake instead of 14 ⎟ 10 ⋅ 2 =
Use the insert mode for the following operation.
LINE
14/0*2=
Press e or d.
This is causing the error.
d1 
=
You can also exit the error screen by pressing A, which clears the calculation.
kInputting with Math FormatWhen inputting with Math format, you can input and display fractions and some functions using the same format as they appear in your textbook.
Important!
•Certain types of expressions can cause the height of a calculation
formula to be greater than one display line.The maximum allowable height of a calculation formula is two display screens (31 dots ⋅ 2).
Further input will become impossible if the height of the calculation you are inputting exceeds the allowable limit.
•Nesting of functions and parentheses is allowed. Further input will become impossible if you nest too many functions and/or parentheses. If this happens, divide the calculation into multiple parts and calculate each part separately.