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 r1954900 = 2.0;
double r1954901 = t;
double r1954902 = 3.0;
double r1954903 = pow(r1954901, r1954902);
double r1954904 = l;
double r1954905 = r1954904 * r1954904;
double r1954906 = r1954903 / r1954905;
double r1954907 = k;
double r1954908 = sin(r1954907);
double r1954909 = r1954906 * r1954908;
double r1954910 = tan(r1954907);
double r1954911 = r1954909 * r1954910;
double r1954912 = 1.0;
double r1954913 = r1954907 / r1954901;
double r1954914 = pow(r1954913, r1954900);
double r1954915 = r1954912 + r1954914;
double r1954916 = r1954915 + r1954912;
double r1954917 = r1954911 * r1954916;
double r1954918 = r1954900 / r1954917;
return r1954918;
}
herbie shell --seed 2019144
(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))))