\[\frac{2}{\left(\left(\frac{{t}^{3}}{\ell \cdot \ell} \cdot \sin k\right) \cdot \tan k\right) \cdot \left(\left(1 + {\left(\frac{k}{t}\right)}^{2}\right) + 1\right)}\]

\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 r8176 = 2.0;
        double r8177 = t;
        double r8178 = 3.0;
        double r8179 = pow(r8177, r8178);
        double r8180 = l;
        double r8181 = r8180 * r8180;
        double r8182 = r8179 / r8181;
        double r8183 = k;
        double r8184 = sin(r8183);
        double r8185 = r8182 * r8184;
        double r8186 = tan(r8183);
        double r8187 = r8185 * r8186;
        double r8188 = 1.0;
        double r8189 = r8183 / r8177;
        double r8190 = pow(r8189, r8176);
        double r8191 = r8188 + r8190;
        double r8192 = r8191 + r8188;
        double r8193 = r8187 * r8192;
        double r8194 = r8176 / r8193;
        return r8194;
}

Reproduce

Please include this information when filing a bug report:

herbie shell --seed 2019191 
(FPCore (t l k)
  :name "Toniolo and Linder, Equation (10+)"
  (/ 2.0 (* (* (* (/ (pow t 3.0) (* l l)) (sin k)) (tan k)) (+ (+ 1.0 (pow (/ k t) 2.0)) 1.0))))

Backtrace

get-representation: Unknown representation #f		L	C
loop	/data/pavpan/nightlies/herbie/interface2/src/points.rkt	122	4
prepare-points	/data/pavpan/nightlies/herbie/interface2/src/points.rkt	146	0
setup-prog!34	/data/pavpan/nightlies/herbie/interface2/src/mainloop.rkt	67	0
run-improve43	/data/pavpan/nightlies/herbie/interface2/src/mainloop.rkt	339	0
(unnamed)	/opt/racket-7.0/collects/racket/private/more-scheme.rkt	261	28
run	/opt/racket-7.0/share/pkgs/profile-lib/main.rkt	39	2
profile-thunk16	/opt/racket-7.0/share/pkgs/profile-lib/main.rkt	9	0
(unnamed)	/opt/racket-7.0/collects/racket/private/more-scheme.rkt	261	28