The expression is .

=    (Apply Distributive property: a(b – c) = ab – ac)

=            (Apply Multiply: )

=                  (Product of two same signs is positive)

=     (Apply Distrubutive proparty: )

=             (Multiply: )

=                    (Product of two different signs is negative)

=                              (Subtract:  )

The simplified expression is .