a = 0.7 (slider from -5 to 5)
b = -1.2 (slider from -5 to 5)
c = 0.7 (slider from -5 to 5)
d = 1.8 (slider from -5 to 5)
P(x) = (a * x^(3)) + (b * x^(2)) + (c * x) + d
z_1, z_2, z_3 = ComplexRoot(P)
teksti1 = LaTeX(P, true, true)