The equivalent expanded expression using the Power Rule of Exponents would be (4⋅4⋅4⋅4⋅4⋅4⋅4⋅4⋅4⋅4) or (4^10).
If the expression 4^10 is simplified using the Power Rule of Exponents, the equivalent expanded expression would be (4⋅4⋅4⋅4⋅4⋅4⋅4⋅4⋅4⋅4), which is equal to 4 multiplied by itself 10 times.