\[x - \frac{y - z}{\frac{\left(t - z\right) + 1}{a}}\]

x - \frac{y - z}{\frac{\left(t - z\right) + 1}{a}}

double f(double x, double y, double z, double t, double a) {
        double r9058 = x;
        double r9059 = y;
        double r9060 = z;
        double r9061 = r9059 - r9060;
        double r9062 = t;
        double r9063 = r9062 - r9060;
        double r9064 = 1.0;
        double r9065 = r9063 + r9064;
        double r9066 = a;
        double r9067 = r9065 / r9066;
        double r9068 = r9061 / r9067;
        double r9069 = r9058 - r9068;
        return r9069;
}

Reproduce

Please include this information when filing a bug report:

herbie shell --seed 2019179 +o rules:numerics
(FPCore (x y z t a)
  :name "Graphics.Rendering.Chart.SparkLine:renderSparkLine from Chart-1.5.3"

  :herbie-target
  (- x (* (/ (- y z) (+ (- t z) 1.0)) a))

  (- x (/ (- y z) (/ (+ (- t z) 1.0) a))))

Backtrace

result arity mismatch; expected number of values not received expected: 2 received: 1 in: local-binding form values...: 0		L	C
loop	/data/pavpan/nightlies/herbie/various-cleanup/src/core/extraction.rkt	25	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-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