can you use a calculator to work out index notation and exponents

Lets see

I will type  5^x=25 into the input box

Output:

$${{\mathtt{5}}}^{{\mathtt{x}}} = {\mathtt{25}} \Rightarrow {\mathtt{x}} = {\frac{{ln}{\left({\mathtt{25}}\right)}}{{ln}{\left({\mathtt{5}}\right)}}} \Rightarrow {\mathtt{x}} = {\mathtt{2}}$$

There you go - that worked   :))

Try this :  click twice upon    =      !!