Hi, my intergration is ok, but I dont know why I suddenly cant do this

$\displaystyle \int { (t - 3)^{2}}dt$

I could expand it to form a quadratic, but isn't their a quicker method:

add one to the bracket power, divide the whole thing by this bracket power then divide by the diffential of the bracket... it's like the chain rule but for integration

this gives me

$\displaystyle \frac{(t-3)^{3}}{3}$

But that is not correct is it?

Thanks