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(14-a4)-21=(69+a)a
We move all terms to the left:
(14-a4)-21-((69+a)a)=0
We add all the numbers together, and all the variables
(-1a^4+14)-((a+69)a)-21=0
We get rid of parentheses
-1a^4-((a+69)a)+14-21=0
We calculate terms in parentheses: -((a+69)a), so:We do not support eapression: a^4
(a+69)a
We multiply parentheses
a^2+69a
Back to the equation:
-(a^2+69a)
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