\"\"

\

The expression is \"\"

\

\"\"                                 (Substitute \"\")

\

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

\

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

\

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

\

\"\"                                                                     (Divide: \"\")\"\"

\

The  value of expression is \"\".