but also $1/12\,{\frac {- \left( -108\,q+12\,\sqrt {12\,{p}^{3}+81\,{q}^{2}}
\right) ^{2/3}+12\,p+i\sqrt {3} \left( -108\,q+12\,\sqrt {12\,{p}^{3}
+81\,{q}^{2}} \right) ^{2/3}+12\,i\sqrt {3}p}{\sqrt [3]{-108\,q+12\,
\sqrt {12\,{p}^{3}+81\,{q}^{2}}}}}=1/6\,\sqrt [3]{-108\,q+12\,\sqrt {
12\,{p}^{3}+81\,{q}^{2}}}+1/6\,\sqrt [3]{-108\,q-12\,\sqrt {12\,{p}^{3
}+81\,{q}^{2}}}
$