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 r2279341 = 2.0;
double r2279342 = t;
double r2279343 = 3.0;
double r2279344 = pow(r2279342, r2279343);
double r2279345 = l;
double r2279346 = r2279345 * r2279345;
double r2279347 = r2279344 / r2279346;
double r2279348 = k;
double r2279349 = sin(r2279348);
double r2279350 = r2279347 * r2279349;
double r2279351 = tan(r2279348);
double r2279352 = r2279350 * r2279351;
double r2279353 = 1.0;
double r2279354 = r2279348 / r2279342;
double r2279355 = pow(r2279354, r2279341);
double r2279356 = r2279353 + r2279355;
double r2279357 = r2279356 + r2279353;
double r2279358 = r2279352 * r2279357;
double r2279359 = r2279341 / r2279358;
return r2279359;
}
herbie shell --seed 2019152
(FPCore (t l k)
:name "Toniolo and Linder, Equation (10+)"
(/ 2 (* (* (* (/ (pow t 3) (* l l)) (sin k)) (tan k)) (+ (+ 1 (pow (/ k t) 2)) 1))))