To come (straight) to the point.

To put it in a nut shell.

To summerize something up.

No problem. I actually agree with Nacir. From the other side, when you put it in the question section, you will get answered by teachers only. If I see a question here, I think the question is more open to debate and I, as a non native speaker, can do a suggestion also. But I see my suggestion is voted up, so it's probably a good translation for what you wanted to say. But still putting it in the question section might be preferable. Anyway, it is not a capital offense.

Oh thanks for your advice..- sry, I'm new here..

Julia, you should have put this question under question section and preferably in German section. But luckily you got the answer.

thank you :)