$\"\"$

The expression is $\"\"$

$\"\"$ (Replace b, c and a with 4, 11 and 9)

To simplify the expression following order of operations to performed:

1. Evaluate the expressions inside grouping symbols.

2. Evaluate Powers.

3. Multiply and/or Divide in order from left to right.

4. Add and/or Subtract in order from left to right. $\"\"$

In the given expression there are no grouping symbols and powers.

First operation is multiplication.

$\"\"$ (Multiply: $\"\"$ )

Next operation is multiplication.

$\"\"$ (Multiply: $\"\"$ )

Next operation is multiplication.

$\"\"$ (Multiply: $\"\"$ ) $\"\"$

Next operation is addition.

$\"\"$ (Add: $\"\"$ )

Next operation is subtraction

$\"\"$ (Subtract: $\"\"$ ) $\"\"$

The value of the expression is 4.