(2/3-x)÷x=[(2-1/2)^2x(2+1/2)-(3/4+1/2-1/6)]÷[(3+1/2)÷(3-1/3)+(3/4-1/2+1/6)]
(2/3-x)÷x=[(2-1/2)^2x(2+1/2)-(3/4+1/2-1/6)]÷[(3+1/2)÷(3-1/3)+(3/4-1/2+1/6)]
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Livello 1