The expression you've provided is:

$63 - 45 + 18$

Let's break it down step-by-step:

1. First, subtract 45 from 63: $63 - 45 = 18$

2. Then, add 18: $18 + 18 = 36$

So, the result of $63 - 45 + 18$ is 36.

Would you like any further clarification on this?

Here are five additional questions for further exploration:

1. What is the order of operations (PEMDAS) and why does it matter in calculations?
2. How does addition affect the interpretation of range in data sets?
3. What is the significance