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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def latex(self):
 """ Returns a string representation for use in LaTeX """

        if not self:
            return ""
        s = str(self)
        s = s.replace("==", " = ")
        s = s.replace("<=", " \leq ")
        s = s.replace(">=", " \geq ")
        s = s.replace("&&", r" \text{ and } ")
        s = s.replace("||", r" \text{ or } ")
        return s