B) 3,328:5,2+(3/14+4/21)·2 8/17

1. Convert decimals and mixed numbers to fractions: 3328/1000 : 52/10 + (9/42 + 8/42) * 34/17.

2. Perform division and addition inside parentheses: 3328/1000 * 10/52 + 17/42 * 2.

3. Simplify and multiply: 3328/5200 + 34/42 = 0.64 + 17/21.

4. Add fractions: 64/100 + 17/21 = 16/25 + 17/21 = (16*21 + 17*25) / (25*21) = (336 + 425) / 525 = 761/525.