I think you need to escape $ and % with \.
NPV=CFt * [1-1(1+r)Tr]- CFo= 84,000 * [1-1(1+13\%)713\%]- 385,000 = \$-13,500
Let’s see here:
NPV=CFt * [1-1(1+r)Tr]- CFo= 84,000 * [1-1(1+13\%)713\%]- 385,000 = \$-13,500
PI = 1 + NPVCFo = 1+ n=1784,000(1,13)n - 385,000385,000 ~ 0,965
It renders OK, but there is no scrollbar to see the whole math. There is, in the preview, though.
In the post, you can only see the other part if you zoom:
