Answer:
5^18 in index form is the answer :)
Explanation:
(5^3)^6
In a polynomial like this the rule is that,
(a^m)^n
= a^m*n (multiply the exponents)
So let a be 5
m be 3 and n be 6
5^3^6
= 5^3*6
= 5^18
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