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(x+4)*(x-5)*(x+2-2i*sqrt(3))*(x+(5+5i*sqrt(3))/2)*(x+(5-5i*sqrt(3))/2)=0
(x+4)*(x-5)*(x+2-2i*sqrt(3))*(x+(5+5i*sqrt(3))/2)*(x+(5-5i*sqrt(3))/2)=0
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