So, I have a final exam coming up. I seem to understand and have grasped the concepts of finding derivatives quite well, but I do make mistakes here and there that cost me marks. I just wanted to know, is there any way to know that you have computed the derivative correctly that is not too complex for someone only in high school?

Like for example: The derivative of is , how would I be able to know for sure that I did this correctly, even though I know this is the derivative for sure but for the more complex functions?

Thanks in advance.