To solve the equation, let's replace the symbols with their respective operations and evaluate each step:

- I denotes ‘’: Place number directly (no operation needed).
- J denotes ‘’: Represents no operation; use the number as is.
- K denotes ‘−’: Represents a subtraction.
- L denotes ‘+’: Represents an addition.

Substitute into the equation:

\[ 15 + (3 \times 9) - (12 \times 2) + (189 \div 9) + 29 \]

Evaluate step-by-step:

1. Calculate the multiplication and division first:
- \( 3 \times 9 = 27 \)
- \( 12 \times 2 = 24 \)
- \( 189 \div 9 = 21 \)

2. Substitute these back into the equation:
- \( 15 + 27 - 24 + 21 + 29 \)

3. Perform the additions and subtraction from left to right:
- \( 15 + 27 = 42 \)
- \( 42 - 24 = 18 \)
- \( 18 + 21 = 39 \)
- \( 39 + 29 = 68 \)

- **Correct Answer**: 68

- **Option 4: 68** is the correct choice. ✅

YOUR ANSWER SEEMS WRONG