double f(double c_p, double c_n, double t, double s) {
double r164130 = 1.0;
double r164131 = s;
double r164132 = -r164131;
double r164133 = exp(r164132);
double r164134 = r164130 + r164133;
double r164135 = r164130 / r164134;
double r164136 = c_p;
double r164137 = pow(r164135, r164136);
double r164138 = r164130 - r164135;
double r164139 = c_n;
double r164140 = pow(r164138, r164139);
double r164141 = r164137 * r164140;
double r164142 = t;
double r164143 = -r164142;
double r164144 = exp(r164143);
double r164145 = r164130 + r164144;
double r164146 = r164130 / r164145;
double r164147 = pow(r164146, r164136);
double r164148 = r164130 - r164146;
double r164149 = pow(r164148, r164139);
double r164150 = r164147 * r164149;
double r164151 = r164141 / r164150;
return r164151;
}