How to calculate the integral $$\int\frac{\tan x}{x+\sin x}\mathrm dx\;\;?$$
I use a website called integral of the day, all the previous ones have answers, but today I cannot find an answer for it and no online calculators can do it either. It comes from this website: https://www.sammserver.com/iotd/ , but as it is the next day it has changed now.