5.5 The Substitution Rule/39

Failed to parse (MathML with SVG or PNG fallback (recommended for modern browsers and accessibility tools): Invalid response ("Math extension cannot connect to Restbase.") from server "https://en.wikipedia.org/api/rest_v1/":): {\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} }