Writing natural logarithmic expression in delphi

Posted by p12297 on May 12, 2003 at 14:45:44:

I want to write this expression in delphi:
DF= log(x)/sqrt((sqr(log(y)))+ sqr(pi)); literally natural log of x divided by the square root of (log y squared plus pi squared). Please let me know how to write it.
Please also tell me if i have to write a function expression for this anywhere in the programme.

Thanks.