To help you with it, plug-in 15 in each equation and see what you get!
<u><em>3×10=30+1=31 is the true meaning and answer for this question.</em></u>
<u><em>Hope you good times!</em></u>
If you are talking about what is in between the two sets of parentheses then the answer would be multiplication hope that helped
For every new answer in the sequence, you subtract 7
