$\"\"$

The expression is $\"\"$ .

The values of the variables are $\"\"$ and $\"\"$ .

Solve the expression.

$\"\"$ (Substitute $\"\"$ in the expression)

$\"\"$ (Substitution: $\"\"$ )

$\"\"$ (Subtraction: $\"\"$ )

Therefore, the expression $\"\"$ is $\"\"$ .

$\"\"$

The expression $\"\"$ is $\"\"$ .