1. The problem is to perform subtraction, but the specific numbers or expressions to subtract are not provided. 2. Subtraction is the operation of finding the difference between two numbers or expressions, represented as $a - b$ where $a$ is the minuend and $b$ is the subtrahend. 3. To subtract, align the numbers by place value and subtract each digit starting from the rightmost digit, borrowing if necessary. 4. Since no specific values are given, please provide the numbers or expressions you want to subtract so I can help you with the calculation.