4) 0,344 * (47,31 + 85,6 - 0,91) : 0,34 : 5

1. Calculate the expression inside the parentheses: 47.31 + 85.6 - 0.91 = 132.02.
2. Multiply 0.344 by 132.02: 0.344 * 132.02 = 45.43508.
3. Divide the result by 0.34: 45.43508 / 0.34 = 133.632588...
4. Divide the result by 5: 133.632588... / 5 = 26.7265176...
Final Answer: 26.7265176...