$\"\"$

Given sentence is "The circumference C of a circle equals the product of 2, $\"\"$ , and the radius r".

The word of indicates product and the symbol is ( $\"\"$ )

The word is equal to and the symbol is (=)

The word “The circumference C of a circle equals” represents “ $\"\"$ ".

The word “The product of 2, $\"\"$ , and the radius r” represents “ $\"\"$ ".

Thus the verbal expression is " $\"\"$ ”

The verbal expression is $\"\"$ .

$\"\"$

The verbal expression is $\"\"$ .