16.2 : 1 -- : -6 + 2 15 5 14 3 12 5

The problem is presented as a mathematical expression that needs to be evaluated. However, the formatting is ambiguous, making it difficult to interpret the intended operations and order of operations. The expression appears to be:

16.2 / 15.5 : -6 + 2 / 14 * 3 / 125

Or it could be interpreted as:

(16.2 / 15.5) : (-6 + 2) / 14 * (3 / 125)

Without clear grouping symbols or a standard mathematical layout, it is impossible to provide a definitive solution. The arrangement of numbers and symbols suggests a potential misinterpretation or error in how the problem was transcribed or presented.

The provided expression is not mathematically well-formed, and therefore cannot be calculated.