https://math.stackexchange.com/help/on-topic mentions about what I can ask on the math site. However, I have tried asking several questions on this site. Yet, every question I asked has been closed as off-topic and deleted. This question here is almost similar to Compute $\int_0^{\pi/2}\frac{\cos{x}}{2-\sin{2x}}dx$, yet the question was closed and deleted. I have been successful in asking question on other StackExchange sites. But on the Math site, things haven't worked well. On other StackExchange sites, I still have the reputation to set bounties. Here on the Math site, I have not yet got the reputation. At https://hsm.stackexchange.com/, I am just above the reputation to set bounties, and I also have the reputation to comment. Here in the Math site, I do not have the reputation to either comment or to set bounties. I really need help asking a Math question?