C/y-c/y+c

It seems like you are presenting an algebraic expression which needs to be simplified. To do this, we'll combine like terms.

The expression you provided is:

c/y - c/y + c

First, let's look at the terms with the same variables and denominators:

c/y - c/y + c

The first two terms both have c/y, and thus they cancel each other out because subtracting something from itself gives zero:

c/y - c/y = 0

This leaves us with just the third term:

0 + c = c

So, the simplified form of your original expression is:

c

Please double-check the original expression to ensure there's no missing information, as context or additional symbols could change the result. If the expression involves different variables or any terms that were not accurately represented, that would need a different approach to simplify properly.