Thank you Plato,
That worked like a charm, really amazing. Can I ask did you choose because you could see it would give you in the denominator? I haven't used a manipulation like that in any other question I've done, but I have a feeling if I had they may have been very much easier. I have a similar one I was stuck on I'll try it on that and see if it helps.
Thanks again.
Thank you e^i*pi, that worked like a charm too. Thanks for the hint about I hadn't used that and might not have seen it. Now I know I should try using that equivalent fraction technique if I'm really stuck, which I have been on another on for some time. I hope it works on it. The difference of two squares has come up a lot. Plato's method above uses it in the denominator.
Thanks again