形式发票

形 = 开 + 彡 : Marie Curie (xi) is modding her fake Santa Clause beard (彡) into a new shape (形). With a bottle opener (开) she carves the beard in the engine's kitchen ((e)ng2) so that it gets a fractal (形) shape (形).

式 = 工 + 弋 : I'll use a specific style as mnemonic symbol: 哥特式, gothic.

Sherlock Holmes and the goth are celebrating a Viking festival in the space station's bathroom. They don't have trunks to throw around, so they use a steel beam. They also celebrate by practising archery. In zero gravity it is easy for them to set one world record after the next.

发 = 山 + 又 : Frankenstein wants to eat lunch in the ashram's bathroom, but wearing boxing gloves, he's unable to unwind that one long, red hair from his forks.

票 = 示 + 覀 : Pocahontas (pi) urgently needs to use the aorta's bathroom (ao4). In the bathroom there is a cleaning lady next to a guidon (示) on which it is written that you have to purchase a ticket (票) if you want to use the bathroom. To make sure that everyone is willing to pay the lady equipped herself with a knuckleduster (覀).