Today, I’d like to explain/talk about ...
Today, I’m going to talk about ...
In my presentation I’ll be proposing/talking about ...
In my presentation today I’m going to explain ...
This morning/afternoon I’d like to review ...
The subject/topic of my/this/today’s presentation is ...
What I’d like to do this morning/afternoon is to present/review/etc. ...
The aim of this presentation is to ...
What I’d like to talk about is ...
What I’m going to explain this afternoon/morning are ...
What I’ll be proposing in my presentation are ...
My presentation this morning/afternoon deals with ...
Today’s presentation will be/focus on ...