Answer :
You have the following expression:
[tex](4+(-170))(5+(-4))[/tex]In order to simplify the previous expression, consider to eliminate inside parenthesis. Proceed as follow:
Eliminate parenthesis inside the two principal factors:
(4 - 170)(5 - 4)
next, simplify inside each parenthesis:
(-1660)(1) = -1660
Hence, the simoplied expression is equal to -1660