Use the --timeout flag to change the timeout.
\frac{2}{\left(\left(\frac{{t}^{3}}{\ell \cdot \ell} \cdot \sin k\right) \cdot \tan k\right) \cdot \left(\left(1 + {\left(\frac{k}{t}\right)}^{2}\right) + 1\right)}double f(double t, double l, double k) {
double r1772589 = 2.0;
double r1772590 = t;
double r1772591 = 3.0;
double r1772592 = pow(r1772590, r1772591);
double r1772593 = l;
double r1772594 = r1772593 * r1772593;
double r1772595 = r1772592 / r1772594;
double r1772596 = k;
double r1772597 = sin(r1772596);
double r1772598 = r1772595 * r1772597;
double r1772599 = tan(r1772596);
double r1772600 = r1772598 * r1772599;
double r1772601 = 1.0;
double r1772602 = r1772596 / r1772590;
double r1772603 = pow(r1772602, r1772589);
double r1772604 = r1772601 + r1772603;
double r1772605 = r1772604 + r1772601;
double r1772606 = r1772600 * r1772605;
double r1772607 = r1772589 / r1772606;
return r1772607;
}
herbie shell --seed 2019194
(FPCore (t l k)
:name "Toniolo and Linder, Equation (10+)"
(/ 2.0 (* (* (* (/ (pow t 3.0) (* l l)) (sin k)) (tan k)) (+ (+ 1.0 (pow (/ k t) 2.0)) 1.0))))