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Z=x+iy Z=|Z|(cosα + i sinα) where |Z|=sqrt(x^2+y^2) α=arctg(y/x) To calculate the power of complex numbers, I used the de Moivre formula. Z^-7+c=(|Z|^-7)*(cos(-7*α) + i sin(-7*α))+c c=-0.8485i
