Step-by-step explanation:
According to the power law of indices, when base numbers are the same and multiplying,add their exponents but when base numbers are the same and dividing, subtract their exponents.
Applying the above rule to the numerators,we have 7^(8+3+4)=7^15
Applying to the denominators we have,
7^(9+5)=7^14
Now we have 7^15/7^14=7
