Here's the question you clicked on:
Jyqft
How do you fix this LaTeX equation?
P = \begin{cases} A_1\left[\dfrac{1-\left(\dfrac{1+g}{1+i}\right)^N}{i-g}\right] & ,\text{ } i \neq g \\ \dfrac{A_1 N}{1+i} & ,\text{ } i=g \end{cases}
The i - g is occupying what seems to be the top half of the denominator, when it should be occupying the whole of it. This is a LaTeX question by the way.
http://openstudy.com/study#/groups/latex%20practicing!%20%3A) \[\begin{cases} A_1\left[\frac{1-\left(\frac{1+g}{1+i}\right)^N}{i-g}\right] & ,\text{ } i \neq g \\ \frac{A_1 N}{1+i} & ,\text{ } i=g \end{cases}\]