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Thanks! That one works perfectly now. Any idea of how I do the sigma with 2 lines under?

Such a great help!

Thank you!!!

However, now I am stuck on this line which is normal text. Anyone have any clue on how to write it?

"If we let $\mathbf{\mu}(t+1)$ be the vector of the expected returns in year t+1 and let $\sum_=$" clearly does not work.

Hi folks,

I am kinda new to LaTeX and trying to build a presentation with some math.

I want to write these two equations, but not quite sure how to do it:

As for equation number (1) I am wondering on how I allign the equations meanwhile I just keep equation 1 and not equation 1 and 2 :)

My code ...