Evaluate the following expression using the BODMAS rule:

$$84-24÷6+(12\text{ of }4)+18-15$$

The correct answer is 131.

To evaluate the given mathematical expression, we follow the BODMAS rule, which defines the correct order of operations:

B: Brackets first
O: Orders / 'Of' operation
D: Division
M: Multiplication
A: Addition
S: Subtraction

The expression to evaluate is:

$84-24÷6+\left(12\text{ of }4\right)+18-15$

Step 1: Simplify inside the Bracket ('Of' operation)
The term 'Of' indicates multiplication.
$12\text{ of }4=12\times 4=48$
Substituting this value back into the expression gives:

$84-24÷6+48+18-15$

Step 2: Perform the Division
Divide $24$ by $6$:
$24÷6=4$
Substitute this result back into the expression:

$84-4+48+18-15$

Step 3: Perform Addition and Subtraction from left to right
First, subtract $4$ from $84$:
$84-4=80$
Next, add $48$:
$80+48=128$
Then, add $18$:
$128+18=146$
Finally, subtract $15$:
$146-15=131$

Thus, the final answer is 131.