<u><em>Answer:</em></u>
x⁵y⁸
<u><em>Explanation:</em></u>
<u>Before we begin, remember that:</u>
xᵃ * xᵇ = xᵃ⁺ᵇ
<u>Now, for the given problem, we have:</u>
x⁴y⁵xy³
<u>This could be written as:</u>
(x⁴ * x¹) * (y⁵ * y³)
<u>Applying the above rule, we would get:</u>
x⁴⁺¹ y⁵⁺³
<u>Simplifying the above, we get:</u>
x⁵y⁸
Hope this helps :)