How to display latex expression with natural log in a plot's legend?

I'm having trouble getting the following LaTex expression to display in the legend. I used those expresions in the Live Editor's Insert Latex Equation and they were accepted so I'm not sure why I'm getting the warning.

Answer 1

[Star Strider]

You have to begin and end each part of the expression with dollar-signs ($).

So:

'$e^\frac{ln(k)}{k}(t-k)$'

and so for the rest.

[Minh Tran]

Beautiful, thanks. Any particular reason why this is?

[Star Strider]

As always, my pleasure.

The ‘$’ are a LaTeX convention for specifying the maths expressions. See: The Not So Short Introduction to LaTeX2e for an extended discussion. (If I remember correctly, the section on maths begins about page 56.)