5.5 The Substitution Rule/39

Failed to parse (syntax error): {\displaystyle \begin(align) & \int\sec^{3}(x)\tan(x)\, }

& u=\sec(x)

& du=\sec(x)\tan(x)\,dx

& \int\sec^{3}(x)\tan(x)\, &

&= \int u^{2}\,du &

&=

\end(align) </math>