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-2n(5+n-8-3n)n=3
We move all terms to the left:
-2n(5+n-8-3n)n-(3)=0
We add all the numbers together, and all the variables
-2n(-2n-3)n-3=0
We multiply parentheses
4n^3+6n^2-3=0
We do not support enpression: n^3
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