It looks like you have an expression involving a colon (:) which is not a standard mathematical operator. If you meant to use a different operator or symbol, please clarify.

However, if you intended to write a division, multiplication, or another operation, here are some possibilities:

1. **Division**: If you meant \((3x + 11) \div (2x - 1)\), then the expression represents the division of \(3x + 11\) by \(2x - 1\).

2. **Multiplication**: If you meant \((3x + 11) \cdot (2x - 1)\), then the expression represents the multiplication of \(3x + 11\) by \(2x - 1\).

3. **Ratio**: If you meant \((3x + 11) : (2x - 1)\) as a ratio, it represents the ratio of \(3x + 11\) to \(2x - 1\).

Please specify the operation you intended, and I can help you further with the expression.