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x in (-oo:+oo)
z*(i+1) = (64*i)/3 // - (64*i)/3
z*(i+1)-((64*i)/3) = 0
z*(i+1)+(-64/3)*i = 0
z*(i+1)+(-64*i)/3 = 0
(3*z*(i+1))/3+(-64*i)/3 = 0
3*z*(i+1)-64*i = 0
3*i*z-64*i+3*z = 0
(3*i*z-64*i+3*z)/3 = 0
(3*i*z-64*i+3*z)/3 = 0 // * 3
3*i*z-64*i+3*z = 0
x belongs to the empty set
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