Mona is at a loss when the Gunbar Cider she's been sent to fetch is sold out. Piers from Q.E.D. promises to help her find more, and takes her to Future City. But awaiting Mona on her first visit there is...
It's a difficult math problem the 
Professor is attempting to solve.
إنّها مسألة رياضيّات صعبة تحاول
.البروفسورة حلّها
Ein ungelöstes mathematisches Problem,
dem sich der Professor gerade widmet.
Un problema matemático muy difícil
con el que lidia Professor.
Un problème très complexe
sur lequel planche le professeur.
È un difficile problema matematico
che sta tenendo impegnata Professor.
É um problema matemático que a 
Professora está tentando solucionar.
Сложная математическая задача,
с которой борется Профессор.