What is c + d and c - d?

Solution:

The image contains a table with entries 'c + d' and 'c - d' in a cell. However, the values of 'c' and 'd' are not provided, nor is there any context that would allow us to determine them.

Therefore, we cannot calculate the values of c + d and c - d.

Answer: The values of c and d are not provided, so c + d and c - d cannot be calculated.