easy peasy 很容易

Thanks for helping me study last night! I think I am ready to take this huge exam now.

谢谢你昨晚帮我复习!我觉得这次大考我已经准备好了。

You're so ready now! The test will be easy peasy.

你现在准备的很充分了。那个考试一定是小菜一碟。

Ain't no thang 没事

I couldn't do it without you! Thanks for explaining all of those complicated equations to me.

没你我肯定不行。谢谢你给我解释那些复杂的公式。

It ain't no thang! Happy to help. 没事，乐意效劳。

no worries 别担心，别客气

Do you think I could review the new equations with you next week? You have helped me so much.

我下周能和你一起再复习新的公式吗?你对我帮助太大了。

No worries, let's meet again same time next week to study.

别客气，咱们下周还是这个时间再见吧。