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x^2*((14*x^3-(6*x^4))/2) = 0
x^2*((14*x^3-6*x^4)/2) = 0
(x^2*(14*x^3-6*x^4))/2 = 0
14*x^3-6*x^4 = 0
2*x^3*(7-3*x) = 0
7-3*x = 0 // - 7
-3*x = -7 // : -3
x = -7/(-3)
x = 7/3
2*x^3*(x-7/3) = 0
(2*x^2*x^3*(x-7/3))/2 = 0
( 2*x^3 )
2*x^3 = 0 // : 2
x^3 = 0
x = 0
( x-7/3 )
x-7/3 = 0 // + 7/3
x = 7/3
( x^2 )
1*x^2 = 0 // : 1
x^2 = 0
x = 0
x in { 0, 7/3, 0 }
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