\"\"

\

The expression is \"\".

\

\"\"     (Apply commutative property of addition: \"\")

\

\"\"  (Apply associative property of addition: \"\")

\

\"\"                (Add: \"\") \"\"

\

\"\"                 (Apply commutative property of addition: \"\")

\

\"\"             (Apply associative property of addition: \"\")

\

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

\

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

\

\"\"

\

The value of the expression is \"\".