{{x -> -4/3 + (4 2^(2/3) (1 + \[ImaginaryI] Sqrt[3]))/(
3 (59 - 3 Sqrt[273])^(
1/3)) + ((1 - \[ImaginaryI] Sqrt[3]) (59 - 3 Sqrt[273])^(1/3))/(
3 2^(2/3))}, {x -> -4/3 + (
4 2^(2/3) (1 - \[ImaginaryI] Sqrt[3]))/(
3 (59 - 3 Sqrt[273])^(
1/3)) + ((1 + \[ImaginaryI] Sqrt[3]) (59 - 3 Sqrt[273])^(1/3))/(
3 2^(2/3))}, {x ->
1/3 (-4 - (8 2^(2/3))/(59 - 3 Sqrt[273])^(
1/3) - (2 (59 - 3 Sqrt[273]))^(1/3))}}