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Period: to
the teacher's favorite formula
It is a novel set in Japan that deals with a math teacher who after an accident only has a memory of 80 minutes.The teacher lived alone in a little house he had had in the garden of his sister-in-law, an elderly lady. dedicated to demonstrate mathematical results proposed in magazines. His sister-in-law decided to hire an assistance to do the housework for the teacher. The arrival of this and her son changes the existence of this man