Idon’t understand the equation someone me

For the first one, since x=5, we would substitute 5 for x in the expression:

So, it would be 5^2, which means 5 multiplied by itself 2 times, so it would be 5×5 which is 25.

For the next one, it's asking:

So if we substitute 5 for x, we get:

Which means 1 multiplied by itself 5 times, so it would be 1×1×1×1×1 which equals 1.

Finally, we have:

So again we substitute 5 for x to get

Which means 5 multiplied by itself one time which is just 5.