7) 3,5 + 8,16 : (1,32 + 3,48) - 0,345

Let's solve the expression step by step, following the order of operations (PEMDAS/BODMAS):

1. First, calculate the value inside the parentheses: $$1.32 + 3.48 = 4.8$$
2. Next, perform the division: $$8.16 : 4.8 = 1.7$$
3. Now, perform the addition: $$3.5 + 1.7 = 5.2$$
4. Finally, perform the subtraction: $$5.2 - 0.345 = 4.855$$

So, the final answer is:

Answer: 4.855