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X(4X+2)+X(4X-1)=2X+1)(4X-2)
We move all terms to the left:
X(4X+2)+X(4X-1)-(2X+1)(4X-2))=0
We multiply parentheses
4X^2+4X^2+2X-1X-(2X+1)(4X-2))=0
We multiply parentheses ..
4X^2+4X^2-(+8X^2-4X+4X-2))+2X-1X=0
We add all the numbers together, and all the variables
8X^2-(+8X^2-4X+4X-2))+2X-1X=0
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