LogCalc - Handy Calculator

This is my attempt in our competition.
While not so fancy it is a pretty handy calculator.
As seen in the following screen shots, the calculator parses the complete formula and allows you to write expressions.
It also keeps a log with all the calculations done.
Using the clipboard methods you can copy calculations from the log to the input field.
'A' - Represents the last answer.
'An' - Represents the nth answer.




The code is almost not documented. Feel free to ask any question about the code.

How do you do it so fast??
My attempt will be ready in the next few days (much more complete than my last App ).

I opted away from using a text string input after finding out how difficult it was to extract all various operations in the correct order.
:sign0188:

Should we all post our attempts at the competition here in this thread or start a new thread?

Regards,
RandomCoder

Start a new thread for other projects so it will be easier to discuss each one.