请分析句子的层级并列The goal here is simple Explain what a derivative is Thing is though there’s some subtlety to this topic and some potential for paradoxes if you’re not careful so the secondary goal is that

主句：The goal here is simple. 并列句1：Explain what a derivative is. 并列句2：Thing is, though, there’s some subtlety to this topic, and some potential for paradoxes if you’re not careful, so the secondary goal is that you have some appreciation for what those paradoxes are and how to avoid them.