Question: now it becomes more complicated.
Answer: --> Now it becomes more complicated.

Question: it works on the principle of a stream of water coming out of a cylinder which at its lowest part has several horizontal paddles bent in one direction.
Answer: --> It works on the principle of a stream of water coming out of a cylinder which at its lowest part has several horizontal paddles bent in one direction.

Question: firmly grasp the bench and let your legs hang to the floor.
Answer:
--> Firmly grasp the bench and let your legs hang to the floor.