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

\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 r8137 = 2.0;
        double r8138 = t;
        double r8139 = 3.0;
        double r8140 = pow(r8138, r8139);
        double r8141 = l;
        double r8142 = r8141 * r8141;
        double r8143 = r8140 / r8142;
        double r8144 = k;
        double r8145 = sin(r8144);
        double r8146 = r8143 * r8145;
        double r8147 = tan(r8144);
        double r8148 = r8146 * r8147;
        double r8149 = 1.0;
        double r8150 = r8144 / r8138;
        double r8151 = pow(r8150, r8137);
        double r8152 = r8149 + r8151;
        double r8153 = r8152 - r8149;
        double r8154 = r8148 * r8153;
        double r8155 = r8137 / r8154;
        return r8155;
}

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