$$ Create a simple calculator application called calc$\_$app.py that performs

and records simple calculations.

$$ The calculator application should allow users to perform a calculation or

print previous calculations stored in a file called equations.txt$.$

$$ If a user chooses to perform a calculation, the app should accept

two numbers and an operation $(+,-,*,$ or $/)$ as inputs from the user.

The answer should be displayed for the user, and the equation and

answer should be recorded in equations.txt $($e$.$g$.21+3=24).$

$$ Use defensive programming to write a robust program that

handles unexpected events and user inputs.

$$ If a user chooses to print previous equations from equations.txt$,$

display all previous equations.

$$ Use defensive coding to ensure the program does not crash

if the file does not exist.