TeX Quellcode:

\begin{array}{rcl} \sqrt[3]{-5-8} &=& \sqrt[6]{-15\cdot (-8)+49} \\\sqrt[3]{-13} &=& \sqrt[6]{169}\\\sqrt[3]{-13} &=& \sqrt[6]{13^2} \\(-13)^{\frac{1}{3}} &=& 13^{2\cdot\frac{1}{6}} \\(-13)^{\frac{1}{3}} &=& 13^{\frac{1}{3}} \\\end{array}