Where are you stuck?
Well , I first let u=x-2, so du=dx. Also, when x=22, u=20, and when x=20,u=18.
In another question exactly the same just different numbers, i did my own procedure and it worked out, but for this one, im not sure if I have to split up the integral into two parts since last time the denominator of the integral u approached 0 (unbounded near u=0).