Logarithms and exponents - again

Thanks - It's nice that you can solve these smaller issues this quick.

There is another thing I have had a problem with, and which is not as easy to solve, - but maybe an idea for a future upgrade?

The length of the input is limited to 216 characters, which in some situations is too short. Is that a design limit of your choise, or is it limited by the programming tools? Can it be extended?