Sextic equation roots
Returns all the roots of a sextic equation with a real or complex number coefficient.
$a*x^6+b*x^5+c*x^4+d*x^3+e*x^2+f*x+g=0$
Note 1: It should be $a\ne0$
Note 2: If the coefficient is a real number, the real number will be written in the first box, the second box will be zero, if the coefficient is a complex number, the real part of the number will be written in the first box, and the virtual or image part will be written in the second box.