6th grade math i mark as brainliest

Answer:
8.5
Step-by-step explanation:
if were finding the sum of the ones in the bracket it would be 8.5
hope it helps
Answer:
24
Step-by-step explanation:
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parenthesis first: 3.4+5.1=8.5
exponents next: 6^2 is 36
then add 8.5 plus 3.5
36-12 is 24