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 r79259178 = 2.0;
double r79259179 = t;
double r79259180 = 3.0;
double r79259181 = pow(r79259179, r79259180);
double r79259182 = l;
double r79259183 = r79259182 * r79259182;
double r79259184 = r79259181 / r79259183;
double r79259185 = k;
double r79259186 = sin(r79259185);
double r79259187 = r79259184 * r79259186;
double r79259188 = tan(r79259185);
double r79259189 = r79259187 * r79259188;
double r79259190 = 1.0;
double r79259191 = r79259185 / r79259179;
double r79259192 = pow(r79259191, r79259178);
double r79259193 = r79259190 + r79259192;
double r79259194 = r79259193 + r79259190;
double r79259195 = r79259189 * r79259194;
double r79259196 = r79259178 / r79259195;
return r79259196;
}
herbie shell --seed 2019120
(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))))