Test Heading 1

Test Heading 2

Test Heading 3

Test Heading 4

Test Heading 5

Test Heading 6

Test Paragraph

• Test unordered list 1
• Test unordered list 2
• Test unordered list 3
• Test unordered list 4
• Test unordered list 5

This text is only for demonstration purposes and can be replaced with actual content later. This text is only for demonstration purposes and can be replaced with actual content later. This text is only for demonstration purposes and can be replaced with actual content later.

1. Test ordered list 1
2. Test ordered list 2
3. Test ordered list 3
4. Test ordered list 4
5. Test ordered list 5

class Calculator:
    def __init__(self):
        self.history = []

    def add(self, a, b):
        result = a + b
        self.history.append(f"{a} + {b} = {result}")
        return result

    def subtract(self, a, b):
        result = a - b
        self.history.append(f"{a} - {b} = {result}")
        return result

    def show_history(self):
        print("\nCalculation History:")
        for item in self.history:
            print(item)


calc = Calculator()

print("Addition:", calc.add(15, 10))
print("Subtraction:", calc.subtract(20, 8))

calc.show_history()