3) The expression is $\"\"$ \ \

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

4) The expression is $\"\"$

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

5) The expression is $\"\"$

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

6) The expression is $\"\"$

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

7) The expression is $\"\"$

\

. $\"\"$

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

8) The expression is $\"\"$

\

$\"\"$

\

$\"\"$

\

$\"\"$ \ \

\