Solve. x cubed over x squared - 4 divided by x cubed - 9x squared over x squared + 7x -18

x^3/x^2-4/x^3-9x^2/x^2+7x-18
factor everything so you know what to cancel out; Also, take the bottom "fraction"; turn it over, spank it, and multiply it to the top "fraction"; like this:
      xxx                          (x+9)(x-2)
            *
          (x-2)(x+2) xx (x-9)

Now cancel like terms top to bottom
    x(x+9)
   
  (x+2) (x-9)

Idk idk idk idk idk idk idk idk