16((1-ix)/(1+ix))^3=((1+ix)/(1-ix))-((1+ix)/(1-ix))^4

You are right in thinking this is hard DragonSlayer554!  Far too hard to do by hand, so I've used the numerical solution capabilities of some technical software to do it:

As i checked, the answer is 8. I am not that sure. Was really hard.

DragonSlayer how did you get your answer!Have you learnt all this in this age!