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

\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 r5766298 = 2.0;
        double r5766299 = t;
        double r5766300 = 3.0;
        double r5766301 = pow(r5766299, r5766300);
        double r5766302 = l;
        double r5766303 = r5766302 * r5766302;
        double r5766304 = r5766301 / r5766303;
        double r5766305 = k;
        double r5766306 = sin(r5766305);
        double r5766307 = r5766304 * r5766306;
        double r5766308 = tan(r5766305);
        double r5766309 = r5766307 * r5766308;
        double r5766310 = 1.0;
        double r5766311 = r5766305 / r5766299;
        double r5766312 = pow(r5766311, r5766298);
        double r5766313 = r5766310 + r5766312;
        double r5766314 = r5766313 - r5766310;
        double r5766315 = r5766309 * r5766314;
        double r5766316 = r5766298 / r5766315;
        return r5766316;
}

Reproduce

Please include this information when filing a bug report:

herbie shell --seed 2019173 
(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

hash-ref: no value found for key key: #<enode 1378(1378)>		L	C
for-loop	/data/pavpan/nightlies/herbie/various-cleanup/src/core/simplify.rkt	197	2
extractor-extract	/data/pavpan/nightlies/herbie/various-cleanup/src/core/simplify.rkt	196	0
for-loop	/data/pavpan/nightlies/herbie/various-cleanup/src/core/simplify.rkt	35	2
(unnamed)	/data/pavpan/nightlies/herbie/various-cleanup/src/core/simplify.rkt	26	0
simplify!	/data/pavpan/nightlies/herbie/various-cleanup/src/mainloop.rkt	217	0
run-iter!	/data/pavpan/nightlies/herbie/various-cleanup/src/mainloop.rkt	320	0
for-loop	/data/pavpan/nightlies/herbie/various-cleanup/src/mainloop.rkt	354	4
run-improve43	/data/pavpan/nightlies/herbie/various-cleanup/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