5.5 The Substitution Rule/27

Failed to parse (unknown function "\begin{align}"): {\displaystyle \begin{align} & \int \cfrac{z^2}{\sqrt[3]{1+z^3}} dz \\[2ex] & \int{tdt} \\[2ex] & \cfrac{t^2}{2} \\[2ex] & \{{pad|4.0em}} t=\sqrt[3]{1+z^3} \\[2ex] &= \cfrac\sqrt[3]{(1+z^3)^2}{2} + C \end{align} }