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+package com.mlefevre.maths.domain.enumeration;%0A%0Apublic enum FormulaElementType %7B%0A%0A    UNKNOWN, ARITHMETICAL_SUM, ARITHMETICAL_PRODUCT, POWER, DIFFERENT, GREATER, GREATER_OR_EQUALS, EQUALS, LOWER, LOWER_OR_EQUALS, SUM, PRODUCT, FRACTION, ROOT, LIMIT, INTEGRAL, DOUBLE_INTEGRAL, TRIPLE_INTEGRAL, UNION, INTERSECTION%0A%0A%7D%0A

Create FormulaElementType.java