Simplify the following expression.

$(60+64÷4\text{ of }4)\times \{1000÷(\left(10\text{ of }\right(3+2\left)\right)\times 2\text{ of }5\left)\right\}-28+(100\times 3\text{ of }3)$.

To simplify the given expression, we follow the BODMAS rule, which determines the order of operations: Brackets, Of, Division, Multiplication, Addition, and Subtraction.

The given expression is:

$(60+64÷4\text{of}4)\times \{1000÷(\left(10\text{of}\right(3+2\left)\right)\times 2\text{of}5\left)\right\}-28+(100\times 3\text{of}3)$

Let us simplify each part of the expression step-by-step:

Step 1: Simplify the first bracket $(60+64÷4\text{of}4)$
According to BODMAS, we evaluate "of" before division and addition:
$4\text{of}4=4\times 4=16$
Now, perform the division:
$64÷16=4$
Finally, add 60:
$60+4=64$

Step 2: Simplify the term inside curly brackets $\{1000÷(\left(10\text{of}\right(3+2\left)\right)\times 2\text{of}5\left)\right\}$
First, evaluate the innermost bracket:
$3+2=5$
This gives us:
$\{1000÷(\left(10\text{of}5\right)\times 2\text{of}5\left)\right\}$
Next, evaluate the "of" terms inside the parentheses:
$10\text{of}5=10\times 5=50$
$2\text{of}5=2\times 5=10$
Now multiply these results:
$50\times 10=500$
Now divide 1000 by 500:
$1000÷500=2$

Step 3: Simplify the third bracket $(100\times 3\text{of}3)$
Evaluate "of" first:
$3\text{of}3=3\times 3=9$
Now perform the multiplication:
$100\times 9=900$

Step 4: Combine the simplified parts back into the expression
Substituting the values obtained from Steps 1, 2, and 3 back into the main expression:
$64\times 2-28+900$
Perform the multiplication first:
$128-28+900$
Next, perform subtraction and addition from left to right:
$128-28=100$
$100+900=1000$

The correct answer is 1000.