solve anything in brackets before anything else.
ex: [7+2(9-4)]8 you would do the 7+2 first, (9) then the parenthesis (5) then multiply the 9 and the 5 (45) and then multiply that by 8 (360)
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Sum is the answer. Just like in regular math.
When you add two or more numbers together, the answer you get is called the sum.
It means that the term inside the brackets needs to be multiplied by the previous term outside the bracket..
Sum of numbers/Count of numbers.
Brackets are used when you want a part of the sum to be done first...EX. 5 + (4+1) On this sum you do the 4 plus 1 first then you add it to five. Brackets separate the sum out! In any case because my example was very easy you do what is in the brackets first