use the fifth property of exponent and simplify:

 

Multiply exponents across a parentheses to remove them.

That is, 

1. multiply the exponent 5 by the exponent 3 in 
the first factor on top to get an exponent of 15.

2. multiply the exponent 3 by the exponent 2 in 
the second factor on top to get an exponent of 6.

3. multiply the exponent 4 by the exponent 4 in 
the bottom to get an exponent of 16.



Now multiply on top by adding the exponents on top 
15+6 to get an exponent of 21 on top:



Now divide by subtracting the exponents 21-16 to
get an exponent of 5



Edwin