C=(a+b)\(a-b)

The expression you've provided seems to be in mathematical notation, specifically a form that resembles a formula or equation. However, it's not clear what you want to do with this expression. Here are a few interpretations and possible steps:

1. Simplification: If you want to simplify the expression \( C = \frac{(a + b)}{(a - b)} \), there isn't much simplification possible unless you have specific values for \( a \) and \( b \).

2. Domain Consideration: It’s important to note that this expression is undefined when \( a = b \) because it would lead to division by zero.

3. Evaluation: If you have specific values for \( a \) and \( b \), you can substitute those values into the expression to evaluate \( C \).

4. Algebraic Manipulation: If you want to manipulate the expression, for example solving for \( a \) or \( b \), that can be done as well.

Please clarify what you would like to do with this expression, and I can assist you further!