\[\frac{4}{\left(\left(3 \cdot \pi\right) \cdot \left(1 - v \cdot v\right)\right) \cdot \sqrt{2 - 6 \cdot \left(v \cdot v\right)}}\]
\frac{4}{\left(\left(3 \cdot \pi\right) \cdot \left(1 - v \cdot v\right)\right) \cdot \sqrt{2 - 6 \cdot \left(v \cdot v\right)}}
double f(double v) {
        double r8530 = 4.0;
        double r8531 = 3.0;
        double r8532 = atan2(1.0, 0.0);
        double r8533 = r8531 * r8532;
        double r8534 = 1.0;
        double r8535 = v;
        double r8536 = r8535 * r8535;
        double r8537 = r8534 - r8536;
        double r8538 = r8533 * r8537;
        double r8539 = 2.0;
        double r8540 = 6.0;
        double r8541 = r8540 * r8536;
        double r8542 = r8539 - r8541;
        double r8543 = sqrt(r8542);
        double r8544 = r8538 * r8543;
        double r8545 = r8530 / r8544;
        return r8545;
}

Reproduce

Please include this information when filing a bug report:

herbie shell --seed 2019191 
(FPCore (v)
  :name "Falkner and Boettcher, Equation (22+)"
  (/ 4.0 (* (* (* 3.0 PI) (- 1.0 (* v v))) (sqrt (- 2.0 (* 6.0 (* v v)))))))

Backtrace

get-representation: Unknown representation #fLC
loop/data/pavpan/nightlies/herbie/interface2/src/points.rkt1224
prepare-points/data/pavpan/nightlies/herbie/interface2/src/points.rkt1460
setup-prog!34/data/pavpan/nightlies/herbie/interface2/src/mainloop.rkt670
run-improve43/data/pavpan/nightlies/herbie/interface2/src/mainloop.rkt3390
(unnamed)/opt/racket-7.0/collects/racket/private/more-scheme.rkt26128
run/opt/racket-7.0/share/pkgs/profile-lib/main.rkt392
profile-thunk16/opt/racket-7.0/share/pkgs/profile-lib/main.rkt90
(unnamed)/opt/racket-7.0/collects/racket/private/more-scheme.rkt26128