Luyện nghe bài hát The Professor's Song

To "if you me your attention."
If you me your attention, I will tell you what I am.
I'm a brilliant math'matician - something of a ham.
I have tried for numerous degrees, in fact I've one of
Of course that me eminently qualified to teach.
I understand the matter thoroughly, it's true,
And I can't see why it all as obvious to you.
Each lecture is a masterpiece, planned,
Yet everybody tells me that I'm to understand,
And I can't why.

My diagrams are of true art, you must agree,
And my is famous for it's legibility.
Take a word like "minimum" (to choose a word),
This was performed at a blackboard, and the wrote:

For anyone to say he cannot that, is absurd.
The anecdotes I tell get more every year,
Though frankly, what they go to prove is sometimes less clear,
And all my explanations are lucid, I am sure,
Yet everybody me that my lectures are obscure,
And I think why.

Consider, for example, the force of gravity:
It's proportional to something - let me see -
It's r^3 - no, r^2 - no, it's r, I'll bet -
The sign in is plus - or is it minus, I forget -
Well, anyway, there is a force, of that is no doubt.
All these formulas are trivial if you only them out.
Yet students tell me, "i have the whole year through
Ev'rything you've told us, but the problems I do."
And I can't why!