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The eternal evolution of every programmer's calculator journey! The "noob" writes an entire Python program with separate functions for addition, subtraction, multiplication, and division, complete with a menu system and user input handling. Meanwhile, the "pro" just drops a single line of pure evil: print(eval(input("Enter Expression: "))). Why write 25 lines when you can write 1 and let users execute arbitrary code on your machine? Nothing says "I trust my users" like giving them a direct pipeline to your system's interpreter. Security? Never heard of her! This is the programming equivalent of building an entire house vs. just leaving your front door wide open with a sign that says "come on in and do whatever!"