`36-[18-{14-(15-4-:2xx2)}]`

Answer

To simplify the expression `36 - [18 - {14 - (15 - 4 ÷ 2 × 2)}]`, we will follow the BODMAS/BIDMAS rule, which stands for Brackets, Orders (i.e., powers and square roots, etc.), Division and Multiplication (from left to right), Addition and Subtraction (from left to right).

### Step-by-Step Solution:

1. **Identify and Solve the Innermost Bracket**:
Start with the innermost round bracket:
\[ (15 - 4 ÷ 2 × 2) \]
According to BODMAS, we first perform the division and multiplication from left to right.
- Calculate \(4 ÷ 2 = 2\)
- Then, calculate \(2 × 2 = 4\)
- Now substitute back into the expression:
\[ 15 - 4 = 11 \]
So, we have:
\[ (15 - 4 ÷ 2 × 2) = 11 \]

2. **Substitute Back into the Curly Bracket**:
Now substitute \(11\) back into the curly bracket:
\[ {14 - (15 - 4 ÷ 2 × 2)} = {14 - 11} \]
Calculate:
\[ 14 - 11 = 3 \]

3. **Substitute Back into the Square Bracket**:
Now substitute \(3\) back into the square bracket:
\[ [18 - {14 - (15 - 4 ÷ 2 × 2)}] = [18 - 3] \]
Calculate:
\[ 18 - 3 = 15 \]

4. **Final Calculation**:
Now substitute \(15\) back into the original expression:
\[ 36 - [18 - {14 - (15 - 4 ÷ 2 × 2)}] = 36 - 15 \]
Calculate:
\[ 36 - 15 = 21 \]

Thus, the final answer is:
\[ \boxed{21} \]