def dim_dtau(self, pars):
self._set_parameters(pars)<EOL>num1 = -self.m * (self.w ** self.c) * self.c* (self.tau ** (self.c - <NUM_LIT:1>)) * np.sin(self.ang)<EOL>term1 = self.sigmai * num1 / self.denom<EOL>num2a = -self.m * self.otc * np.sin(self.ang)<EOL>num2b = <NUM_LIT:2> * (self.w ** <NUM_LIT>) * self.c * (self.tau ** (self.c - <NUM_LIT:1>)) *np.cos(self.ang)<EOL>num2c = <NUM_LIT:2> * self.c * (self.w ** (self.c * <NUM_LIT:2>)) *(self.tau ** (<NUM_LIT:2> * self.c - <NUM_LIT:1>))<EOL>term2 = self.sigma0 * num2a * (num2b + num2c) / (self.denom ** <NUM_LIT:2>)<EOL>result = term1 + term2<EOL>return result<EOL>
r"""
        :math:Add formula