CALCULUS HELP -- 3

I require immediate assistance with all calculus problems that I am currently facing. Specifically, I need help with derivatives, integrals, and limits. As this is an extremely urgent task, I need someone who can help me within the next few hours. I prefer to receive help through written explanations, and I am looking for a highly skilled and experienced tutor who can provide clear and concise explanations to help me understand these complex topics.