\"\"\"\"

\

The expression is \"\".

\

\"\"                         (Using commutative property: \"\")

\

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

\

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

\

\"\"                            (Substitute \"\")

\

\"\"                                       (Product of two same signs is positive)\"\"

\

The value of expression is 8.