\[\left({\left(\frac{d}{h}\right)}^{\left(\frac{1}{2}\right)} \cdot {\left(\frac{d}{\ell}\right)}^{\left(\frac{1}{2}\right)}\right) \cdot \left(1 - \left(\frac{1}{2} \cdot {\left(\frac{M \cdot D}{2 \cdot d}\right)}^{2}\right) \cdot \frac{h}{\ell}\right)\]

\left({\left(\frac{d}{h}\right)}^{\left(\frac{1}{2}\right)} \cdot {\left(\frac{d}{\ell}\right)}^{\left(\frac{1}{2}\right)}\right) \cdot \left(1 - \left(\frac{1}{2} \cdot {\left(\frac{M \cdot D}{2 \cdot d}\right)}^{2}\right) \cdot \frac{h}{\ell}\right)

double f(double d, double h, double l, double M, double D) {
        double r8472 = d;
        double r8473 = h;
        double r8474 = r8472 / r8473;
        double r8475 = 1.0;
        double r8476 = 2.0;
        double r8477 = r8475 / r8476;
        double r8478 = pow(r8474, r8477);
        double r8479 = l;
        double r8480 = r8472 / r8479;
        double r8481 = pow(r8480, r8477);
        double r8482 = r8478 * r8481;
        double r8483 = M;
        double r8484 = D;
        double r8485 = r8483 * r8484;
        double r8486 = r8476 * r8472;
        double r8487 = r8485 / r8486;
        double r8488 = pow(r8487, r8476);
        double r8489 = r8477 * r8488;
        double r8490 = r8473 / r8479;
        double r8491 = r8489 * r8490;
        double r8492 = r8475 - r8491;
        double r8493 = r8482 * r8492;
        return r8493;
}

Reproduce

Please include this information when filing a bug report:

herbie shell --seed 2019191 
(FPCore (d h l M D)
  :name "Henrywood and Agarwal, Equation (12)"
  (* (* (pow (/ d h) (/ 1.0 2.0)) (pow (/ d l) (/ 1.0 2.0))) (- 1.0 (* (* (/ 1.0 2.0) (pow (/ (* M D) (* 2.0 d)) 2.0)) (/ h l)))))

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