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=(21-2V)(29.7-2V)(V)
We move all terms to the left:
-((21-2V)(29.7-2V)(V))=0
We add all the numbers together, and all the variables
-((-2V+21)(-2V+29.7)V)=0
We multiply parentheses ..
-((+4V^2-59.4V-42V+623.7)V)=0
We calculate terms in parentheses: -((+4V^2-59.4V-42V+623.7)V), so:
(+4V^2-59.4V-42V+623.7)V
We multiply parentheses
4V^3-59V^2-42V^2+623.7V
We do not support eVpression: V^3
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