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(n^2+65)-65(n^2+65)^2+64=0
We get rid of parentheses
n^2-65(n^2+65)^2+65+64=0
We add all the numbers together, and all the variables
n^2-65(n^2+65)^2+129=0
We move all terms containing n to the left, all other terms to the right
n^2-65(n^2+65)^2=-129
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