public void action(String stringRecup) {
        if (stringRecup.equals("")) {
            practice.addWrong(iterateur - 1);
        } else {
            switch (e.getType()) {
                case "calculation":
                    actionIfCalculation(stringRecup);
                    break;
                case "fraction":
                    actionIfFraction(stringRecup);
                    break;
                case "power":
                    actionIfPower(stringRecup);
                    break;
                case "equation":
                    actionIfEquation(stringRecup);
                    break;
                case "custom":
                    actionIfCustom(stringRecup);
                    break;
            }
        }

    }