5^3 x 5^4
To simplify this expression, we can use the property of exponents that states that when we multiply two numbers with the same base, we add the exponents.
So, 5^3 x 5^4 can be simplified as 5^(3+4) = 5^7.
So, 5^3 x 5^4 can be simplified as 5^(3+4) = 5^7.