Error when trying to use text like arrays

[KienPS]

I write this in my code, and it works fine:
title = TexMobject("\\frac{tanx - \\sqrt{3}}{2cosx + 1} = 0")
But when I write like this:
title = TexMobject("\\frac{","tanx","-\\sqrt{3}}{","2cosx","+1} = 0")
I got Xelatex error converting to dvi
What's the problem here?

[Elteoremadebeethoven]

Like I said in my video don't use \frac to fragment formulas, use \over.