He failed his exams and didn't bother about the resits.

他考试没有通过，却没有为补考而感到烦恼。

Don't bother about those trifles. You should focus on your study.

不要为这些琐事而费心。你应该专注于学习。

Things go on all the same overhead, and you let 'em, and don't bother about 'em.

上面的事情都照样进行，你让他们去吧，不用为他们操心。

You needn't bother about this.

这件事你就不必过问了。

Don't bother about such trifles.

这丁点儿事不必放在心上。