You have the following expression:
![(4+(-170))(5+(-4))](https://img.qammunity.org/2023/formulas/mathematics/college/d6z33o2ts1ib4lmt14bfm5dh4ha4qtiyp6.png)
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