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r=(r^2-1)^3/(2r+1)^5
We move all terms to the left:
r-((r^2-1)^3/(2r+1)^5)=0
Domain of the equation: (2r+1)^5)!=0We multiply all the terms by the denominator
r∈R
r*(2r+1)^5)-((r^2-1)^3=0
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