First, undo the overflow from within the tub. It is a straight pipe down to the drain which forms a tee. Undo the drain from within the tub with a drain removal tool or a pair of pliers. At that point the tub will be free from the plumbing. If you decide to demo the tub, be sure to wear safety goggles and hefty gloves with long sleeve shirt. Those shards are like little knives and will cut you.
Half of Communications is Listening, and You can't Listen with your Mouth.