Answer:
-18
Step-by-step explanation:
First for 9 and 12 there are two negitive signs so it turns positive so you get -9+12-17-4 so you add -9 and 12 which is 3 so you now have 3-17-4 so subtract 17 from 3 to get -14 so your equasion will look like this -14-4 and that equals -18
