Please explain this and answer it for me?

Step-by-step explanation:
Okay, this is gonna clear things up real quick :)
A number with a fraction as an exponent has the denominator become the type of root and the numerator to the power of. So, 7^(r/o)=°√7^r
And, when like-bases are multiplied, the exponents are added.
So, x^12•x^14=x^(12+14)=x^26
For your specific problem:
6^2•(3√6)
6^2•6^(1/3)
6^(2+1/3)
6^(6/3+1/3)
6^(7/3)