> 10-5(T2), the -5 and the 2 are small and raised like exponents.  
> So would I enter 10^-5(T^2)

You'd want a "*" (multiplication) between the 5 and the "(".
Assuming you have labelled a cell as "T".
I'd put brackets around the "10-^5" as well. None of them are required, 
but it makes it a bit more self explanatory.

Steve.

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