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 r100208659 = 2.0;
double r100208660 = t;
double r100208661 = 3.0;
double r100208662 = pow(r100208660, r100208661);
double r100208663 = l;
double r100208664 = r100208663 * r100208663;
double r100208665 = r100208662 / r100208664;
double r100208666 = k;
double r100208667 = sin(r100208666);
double r100208668 = r100208665 * r100208667;
double r100208669 = tan(r100208666);
double r100208670 = r100208668 * r100208669;
double r100208671 = 1.0;
double r100208672 = r100208666 / r100208660;
double r100208673 = pow(r100208672, r100208659);
double r100208674 = r100208671 + r100208673;
double r100208675 = r100208674 + r100208671;
double r100208676 = r100208670 * r100208675;
double r100208677 = r100208659 / r100208676;
return r100208677;
}
herbie shell --seed 2019128
(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))))