$\"\"$

The functions are $\"\"$ .

Observe the points from the graph of function $\"\"$ as follows:

$\"\"$

The difference of $\"\"$ is

$\"\"$

$\"\"$ .

The value of $\"\"$ .

$\"\"$

The functions are $\"\"$ .

Observe the points from the graphs $\"\"$ as follows:

$\"\"$

The product of $\"\"$ is $\"\"$

$\"\"$

The value of $\"\"$ .