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 r15009944 = 2.0;
double r15009945 = t;
double r15009946 = 3.0;
double r15009947 = pow(r15009945, r15009946);
double r15009948 = l;
double r15009949 = r15009948 * r15009948;
double r15009950 = r15009947 / r15009949;
double r15009951 = k;
double r15009952 = sin(r15009951);
double r15009953 = r15009950 * r15009952;
double r15009954 = tan(r15009951);
double r15009955 = r15009953 * r15009954;
double r15009956 = 1.0;
double r15009957 = r15009951 / r15009945;
double r15009958 = pow(r15009957, r15009944);
double r15009959 = r15009956 + r15009958;
double r15009960 = r15009959 + r15009956;
double r15009961 = r15009955 * r15009960;
double r15009962 = r15009944 / r15009961;
return r15009962;
}
herbie shell --seed 2019143
(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))))