关于英语翻译的!

Regardless of being any matter, we must complete diligently./
Whatever the matter, we should strive to complete.

翻译了两种，希望对你有帮助^^

Whatever something,try your best to finish it!

We should exert ourselves to do it,no matter whatever things are!

Whatever it is, try your best (to achieve it).
(个人认为不加括号里的比较简练）

we should try our best to do everything

Try your best to do anyting well .