Struggling with integration at A2

A reasonable cheat sheet at
https://www.a-levelmaths.com/Summary%20Handouts/Integration%20Techniques%20Summary.pdf

For differentiation you had to memorise simple rules e.g. the derivative of six is cosx but other than that all you needed was to memorise formulas e.g. (v du/dx -u dv/dx)/v^2.I feel like integration doesn't really have much formulas atlas at A2.I am really struggling with reverse chain rule just trying to memorise past answers to questions and see if the same patterns Ould follow but the pattern seems very irregular.If anyone knows any formulas for integration except (x^n+1)/n+1 than please let me know.