\"\"

\

The expression is \"\".

\

\"\"                        (Substitute \"\")

\

\"\"                               (Product of two different signs is negative)

\

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

\

\"\"                                    (Add: 3 + 0.6 = 3.6) \ \

\

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

\

The value of the expression is 1.9 .