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If the area of the polygon whose vertice...

If the area of the polygon whose vertices are the solutions (in the complex plane) of the equation `x^7+x^6+x^5+x^4+x^3+x^2+x+1=0,` can be expressed in the simplest form as `(asqrtb+c)/d,` find the value of `(a + b +c+d).`

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