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t in (-oo:+oo)
t^3*((12*t^6-(8*t^8))/2) = 0
t^3*((12*t^6-8*t^8)/2) = 0
(t^3*(12*t^6-8*t^8))/2 = 0
12*t^6-8*t^8 = 0
4*t^6*(3-2*t^2) = 0
-2*t^2 = -3 // : -2
t^2 = 3/2
t^2 = 3/2 // ^ 1/2
abs(t) = (3/2)^(1/2)
t = (3/2)^(1/2) or t = -(3/2)^(1/2)
4*t^6*(t-(3/2)^(1/2))*(t+(3/2)^(1/2)) = 0
(4*t^3*t^6*(t-(3/2)^(1/2))*(t+(3/2)^(1/2)))/2 = 0
( 4*t^6 )
4*t^6 = 0 // : 4
t^6 = 0
t = 0
( t+(3/2)^(1/2) )
t+(3/2)^(1/2) = 0 // - (3/2)^(1/2)
t = -(3/2)^(1/2)
( t-(3/2)^(1/2) )
t-(3/2)^(1/2) = 0 // + (3/2)^(1/2)
t = (3/2)^(1/2)
( t^3 )
1*t^3 = 0 // : 1
t^3 = 0
t = 0
t in { 0, -(3/2)^(1/2), (3/2)^(1/2), 0 }
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