\[x \cdot e^{y \cdot \left(\log z - t\right) + a \cdot \left(\log \left(1 - z\right) - b\right)}\]

x \cdot e^{y \cdot \left(\log z - t\right) + a \cdot \left(\log \left(1 - z\right) - b\right)}

double f(double x, double y, double z, double t, double a, double b) {
        double r8043 = x;
        double r8044 = y;
        double r8045 = z;
        double r8046 = log(r8045);
        double r8047 = t;
        double r8048 = r8046 - r8047;
        double r8049 = r8044 * r8048;
        double r8050 = a;
        double r8051 = 1.0;
        double r8052 = r8051 - r8045;
        double r8053 = log(r8052);
        double r8054 = b;
        double r8055 = r8053 - r8054;
        double r8056 = r8050 * r8055;
        double r8057 = r8049 + r8056;
        double r8058 = exp(r8057);
        double r8059 = r8043 * r8058;
        return r8059;
}

Reproduce

Please include this information when filing a bug report:

herbie shell --seed 2019191 
(FPCore (x y z t a b)
  :name "Numeric.SpecFunctions:incompleteBetaApprox from math-functions-0.1.5.2, B"
  (* x (exp (+ (* y (- (log z) t)) (* a (- (log (- 1.0 z)) b))))))

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