5.5 The Substitution Rule/33

$\int {\sqrt {\cot(x)}}\csc ^{2}{(x)}dx$

Failed to parse (Conversion error. Server ("https://en.wikipedia.org/api/rest_") reported: "Cannot get mml. TeX parse error: Bracket argument to \\ must be a dimension"): {\displaystyle {\begin{aligned}u&=\cot {(x)}\\[2e]du&=\end{aligned}}}