a+b=

The expression \( a + b \) represents the sum of the variables \( a \) and \( b \). To provide a specific value, you need to define what \( a \) and \( b \) are. For example, if \( a = 2 \) and \( b = 3 \), then:

\[ a + b = 2 + 3 = 5 \]

If you have specific values for \( a \) and \( b \) or further context related to this equation, feel free to share!