1. The problem is to simplify the expression $+17 + (+1,7)$. 2. First, note that the expression contains a comma in $(+1,7)$ which is not standard notation for a number. Assuming it is a typo and should be $+1.7$ or $+17$, we will consider both cases. 3. Case 1: If it is $+1.7$, then the expression becomes $17 + 1.7$. 4. Adding these gives $$17 + 1.7 = 18.7.$$ 5. Case 2: If it is $+17$, then the expression becomes $17 + 17$. 6. Adding these gives $$17 + 17 = 34.$$ 7. Please clarify if the comma was a decimal point or a separator. Assuming it is a decimal point, the simplified result is $18.7$.