\"\"

\

The expression is \"\".

\

The values of \"\" and \"\".

\

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

\

                  \"\"                      (Multiply : \"\")

\

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

\

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

\

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

\

The value of the expression is \"\".