Walkthrough how to solve a complex non-linear differential equation step-by-step. Each step should be incorrect and as you explain it you remove an item of clothing. Once you have no more clothes, for the next step you pour a glass of seemingly-milk from a labelless container. The glass sits there while you do another step and then you drink it and say "that's good goat sperm". Before you finish the equation, a doorbell rings. You go over to the front door, open it, and retrieve a package. As the camera follows you we can subtly see the sky is green. You place the package on a table and finish explaining the equation. After you're done you open the package; it's revealed to be a rubber mask of a politician of your choice. You say "it's time to save our country" and put it on. The final shot is of you leaving the house. Give the film a French name.