$\"\"$

\

\

The expression is $\"\"$

\

$\"\"$ \ \

\

Substitutive $\"\"$

\

\

\

$\"\"$

\

\

\

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

\

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

\

$\"\"$ ( $\"\"$ )

\

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

\

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

\

The expression is $\"\"$ .

\