Yes, exactly. I have it down to ['33', '+', '4', '*', '2', '/', '6'] form.
What I was initially trying to do was do the dividing/multiplying first, to follow standard order of operations. But, maybe I should just do it left to right and save myself a bit of the hassle right now.
Going to take a break for a couple hours and come back to it, has me a little frustrated at the moment! Thanks Mr Smooth.