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x^3*((6*x^6-(12*x^3))/3) = 0
x^3*((6*x^6-12*x^3)/3) = 0
(x^3*(6*x^6-12*x^3))/3 = 0
6*x^6-12*x^3 = 0
6*x^3*(x^3-2) = 0
1*x^3 = 2 // : 1
x^3 = 2
x^3 = 2 // ^ 1/3
x = 2^(1/3)
6*x^3*(x-2^(1/3)) = 0
(6*x^3*x^3*(x-2^(1/3)))/3 = 0
( 6*x^3 )
6*x^3 = 0 // : 6
x^3 = 0
x = 0
( x-2^(1/3) )
x-2^(1/3) = 0 // + 2^(1/3)
x = 2^(1/3)
( x^3 )
1*x^3 = 0 // : 1
x^3 = 0
x = 0
x in { 0, 2^(1/3), 0 }
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