7.1 Integration By Parts/13

Failed to parse (unknown function "\quaddt"): {\displaystyle \int t\sec^2\left(2t\right)\quaddt }

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 u = t \qquad dv = \sec^2\left(2t\right)}

Failed to parse (Conversion error. Server ("https://en.wikipedia.org/api/rest_") reported: "Cannot get mml. Server problem."): {\displaystyle du=dt\qquad v={\frac {1}{2}}\tan \left(2t\right)}