(18*0,4-(5-4,8:4))+10,9

Let's break down the expression step by step:

1. Calculate the division: \[ 4.8 \div 4 = 1.2 \]

2. Substitute the division result back into the expression: \[ 18 \times 0.4 - (5 - 1.2) + 10.9 \]

3. Calculate the subtraction inside the parentheses: \[ 5 - 1.2 = 3.8 \]

4. Now substitute this back into the expression: \[ 18 \times 0.4 - 3.8 + 10.9 \]

5. Calculate the multiplication: \[ 18 \times 0.4 = 7.2 \]

6. Now substitute this back into the expression: \[ 7.2 - 3.8 + 10.9 \]

7. Perform the subtraction: \[ 7.2 - 3.8 = 3.4 \]

8. Finally, add 10.9: \[ 3.4 + 10.9 = 14.3 \]

Therefore, the final result is: \[ \boxed{14.3} \]