Answer:
1.6f+0.4j-13
In order to simplify this problem you would need to combine all like terms
-1.3f+0.4j-12-1+2.9f (first we could put together -12-1=-13)
-1.3f+0.4j-13+2.9f (we would then put together -1.3f+2.9f=1.6f)
1.6f+0.4j-13 would be you simplified equation