What is the value of the following expression?
$$52-[18÷3+3+(18-11)\text{ of }4]$$

Follow the BODMAS rule to evaluate the given expression:
$$52-[18÷3+3+(18-11)\text{ of }4]$$

Step 1: Simplify the parenthesis ()

$$(18-11)=7$$

The expression becomes:

$$52-[18÷3+3+7\text{ of }4]$$

Step 2: Evaluate the 'of' operation

$$7\text{ of }4=7\times 4=28$$

The expression becomes:

$$52-[18÷3+3+28]$$

Step 3: Solve the division inside the square bracket []

$$18÷3=6$$

The expression becomes:

$$52-[6+3+28]$$

Step 4: Solve the addition inside the square bracket []

$$[6+3+28]=37$$

The expression reduces to:

$$52-37$$

Step 5: Perform the final subtraction

$$52-37=15$$