Is it possible to overload an operator for a built-in type? And if so what is it's syntax?
EG:

//Use of overloaded operator^ for types double and double (assuming it is overloaded for exponent):
double a=10.0;
double b=2.5;
double pow=a^b;//pow is approximately 316.22....

No.
In order to do what you want you need to 'wrap' the type in a class and provide operators through that interface.

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