GM calc- can find out error

GM calc, a concise and efficient error correcting calculator.
More convenient and practical than built-in calculators. The memory is very small, easy to operate, and the scientific design is as smooth as using a notebook. Can still correct mistakes.
The functions are as follows:
Easy to operate: Three finger long press with undo and redo options. Support moving the cursor left and right for arbitrary modification. Just as convenient as a notebook.
Full display of long formulas: large box input, central layout, even the longest formula can be fully displayed.
Error correction: The GM calculator "first release" supports identifying errors in formulas, whether it is symbol overlap, decimal point anomalies, or even parentheses, it can flash to indicate the error position of the formula. The error correction function has been running steadily for many years.
History: supports querying the history of calculation results, and even long formulas will be fully displayed.
Support the calculation of random numbers, various power roots, logarithmic trigonometric functions, etc., and open up various function formulas in the future.
When you find it difficult to make a decision and want a random number, you can use rand% 2 to simulate flipping a coin and randomly get 0 or 1.