\"\"

\

The expression is \"\".

\

\"\"                      (6 can be written as \"\")\"\"

\

If \"\", where b,d \"\".

\

\"\"

\

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

\

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

\

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

\

The product is \"\". \ \