



 
Hi Bill, There are different ways to approach this problem. One way is to see t^{ 4} as one symbol, let me say z = t^{ 4}, and then see
In fact if you see t^{ 4} as one symbol you don't need the z at all.
You could however proceed the way you suggest. write t^{ 4} as 1/t^{4} and get
I hope this helps,  


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