\"\"

\

The expression is \"\".

\

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

\

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

\

                         \"\"                    (Multiply)

\

                         \"\"                             (Substitute: \"\")

\

                         \"\"                               (Multiply)

\

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

\

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

\

\"\"

\

\"\".