Timeout in 10.0m

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\[\frac{2}{\left(\left(\frac{{t}^{3}}{\ell \cdot \ell} \cdot \sin k\right) \cdot \tan k\right) \cdot \left(\left(1 + {\left(\frac{k}{t}\right)}^{2}\right) - 1\right)}\]
\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 r68093288 = 2.0;
        double r68093289 = t;
        double r68093290 = 3.0;
        double r68093291 = pow(r68093289, r68093290);
        double r68093292 = l;
        double r68093293 = r68093292 * r68093292;
        double r68093294 = r68093291 / r68093293;
        double r68093295 = k;
        double r68093296 = sin(r68093295);
        double r68093297 = r68093294 * r68093296;
        double r68093298 = tan(r68093295);
        double r68093299 = r68093297 * r68093298;
        double r68093300 = 1.0;
        double r68093301 = r68093295 / r68093289;
        double r68093302 = pow(r68093301, r68093288);
        double r68093303 = r68093300 + r68093302;
        double r68093304 = r68093303 - r68093300;
        double r68093305 = r68093299 * r68093304;
        double r68093306 = r68093288 / r68093305;
        return r68093306;
}

Reproduce

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))))