Answer:
6.601
Step-by-step explanation:
We can remove the brackets, getting -5.12 + 4.7 + 7.021.
Then we can evaluate:
-5.12 + 4.7 + 7.021 = 6.601
(-5.12)-(-4.7)+(7.021) = -5.12 + 4.7+7.021 = 6.601