Answer:
1800e^7f^3
Explanation:
I'm assuming you mean (45e^6)(8f)(5ef^2)
we can simplify this into 45e^68f5ef^2 because of the commutative and associative properties. Then we can simplify into (45 * 8 * 5 ) into 1800. Then by combining like terms we can change e^6 f e f&2 into e^7 f^3 which added together with 1800 gives you the answer.
hope this helped!