\"\"

\

The expression is \"\".

\

The value are \"\" and \"\".

\

\"\"        (Substitute \"\" and \"\")

\

                        \"\"    (Distributive property: \"\")

\

                        \"\"           (Multiply)

\

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

\

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

\

Therefore, the value of expression is \"\".

\

\"\"

\

\"\".