А+б=?

Your question seems to be about a simple algebraic addition where "а" and "б" are variables representing numbers. The expression "а+б" means that you are adding the value of "а" to the value of "б". Without specific values for "а" and "б", the answer remains an expression of the sum of the two variables, which is "а+б". If you have specific values for these variables and would like to perform the addition, please provide the values, and I can assist you further.