>>648
\emoji{lol} you are started from solution when you wrote \( x=sqrt[3]{p+q}+sqrt[3]{p-q} \) 
If you reinvente the wheel how do you solve \( x^5+px^2+qx+t=0 \) or \( x^6+ax^3+bx^2+cx+d=0 \)? \emoji{thinking}