If y3 then y3 y3-y

Y^3(Y^3-Y)=???

We know Y=3 so this, Y^3(Y^3-Y) now looks like this..

3^3(3^3-3)

For the outside

we know 3^3=27

Ex. 3x3x3=27

Break Down

3x3=9x3=27

So from Y^3(Y^3-Y)

we went to 3^3(3^3-3)

to this 27(27-3)

Now subtract 27-3=24to get you final X

27(24)= or 27*24= 648

Steps...

Y^3(Y^3-Y)

Y^3(Y^3-Y)

3^3(3^3-3)

27(27-3)

27(24)= or 27*24= 648