Вы ввели
2*x^4 - 5*x^2 + 2 = 0
2*x^4 - 5*x^2 + 2 = 0
4 2 2*x - 5*x + 2 = 0
4 2
2*x - 5*x + 2 = 0
$$2 x^{4} - 5 x^{2} + 2 = 0$$
$$2 x^{4} - 5 x^{2} + 2 = 0$$