\"\"

\

The expression is \"\".

\

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

\

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

\

           \"\"                    (Multiply)

\

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

\

          \"\"                            (Multiply)

\

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

\

\"\"

\

\"\".