Good flash calculator??

Does anyone know if there's a good Flash 7/AS 2 calculator out there with source? I found Ultimate Calculator, but it's Flash 6, AS1 and I've spent 2 days trying to upgrade the code, but it's all a mix of strings and numbers and I've pulled out almost all of my remaining hair trying to track things down...

If there's a flash 8 calculator out there, that would be fantastic!!

But...it's got to have (), log, sin, cos, tan, and squares...

Anyone?? Can anyone think of a sample in a book??

Thanks!!!