解析几何学

解 = 刀 + 牛 + 角 : Mnemonic symbol: acetone, in which anything can be dissolved.

Inside of the elevator (e3) Joan of Arc (ji) is dissolving a horn (角). A moment ago she cut the horn from the bull's (牛) head using a cleaver (刀). The bull is still shocked as he sees Joan of Arc dissolve (解) his horn in acetone (解).

析 = 斤 + 木 : Mnemonic symbol: a mass spectrometer.

Marie Curie (xi) got a new mass spectrometer (析) for Christmas. In front of the space station (Ø1) she smashes the Christmas tree (木) into a small powder using two barbells (斤) so that she can analyze (析) it with her new mass spectrometer.

Joan of Arc (ji) is sitting at a small table (几) in front of the space station (Ø1) and reading her Bible, waiting for a message from God.

何 = 亻 + 可 : Mnemonic symbol (from "carry"): baby sling

何 = 亻 + 可 : In the elevator's kitchen, Rosa Luxemburg picks up the crying baby Hamlet from his bed of nails, puts him in his baby sling and tries to calm him down.

学 = 小 + 冖 + 子 : Xu Xian wants to study scienceology and learn more about daisies. Just inside the elevator's kitchen, he put some daisies into a prize cup and covered them with a cooking top. He wants to study the growth rate of the daisies depending on the pH of the water in the prize cup.