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Jun 24th, 2019
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  1. <programa> := (un-programa) expresion
  2.  
  3.  
  4. <expresion> := (numero-lit) <número>
  5. := (texto-lit)"<letras>"
  6. := (primitiva-exp) <primitiva> [expresion (expresion*) (;)]
  7.  
  8. <primitiva> := (suma) +
  9. := (resta) -
  10. := (modulo) mod
  11. := (multiplicacion) *
  12. := (concat) concat
  13. := (length) length
  14.  
  15. <número> digito digito*
  16. <letras> letra (letra | digito)*
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