In this paper, an optimal application of symbols is described, in the context of European Higher Education Area (EHEA) for engineering degrees. Handling mathematical symbols and foreign language are common competences, and the proposal is to deal with both at the same time. On-line resources as Class-Talk help university lecturers and students to communicate more effectively in the classroom when a foreign language is used. In that setting the use of mathematics symbols at engineering degrees highlighted the difficulties in the equivalence of verbal and symbolic languages. To manage them, some resources have been developed, mainly the application Multilingual Formulae presented in this paper.

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