def dre_dtau(self, pars):
self._set_parameters(pars)<EOL>num1 = self.c * self.w * self.otc1 * np.cos(self.ang)<EOL>term1 = num1/self.denom<EOL>num2a = self.otc * np.cos(self.ang)<EOL>num2b = <NUM_LIT:1> + num2a<EOL>denom2 = self.denom ** <NUM_LIT:2><EOL>term2 = num2b / denom2<EOL>term3 = <NUM_LIT:2> * self.c * self.w * self.otc1 * np.cos(self.ang) + self.otc2<EOL>result = self.sigmai * self.m * (term1 + term2 * term3)<EOL>return result<EOL>
r"""
        :math:Add formula