\[\frac{60 \cdot \left(x - y\right)}{z - t} + a \cdot 120\]

\frac{60 \cdot \left(x - y\right)}{z - t} + a \cdot 120

double f(double x, double y, double z, double t, double a) {
        double r9428 = 60.0;
        double r9429 = x;
        double r9430 = y;
        double r9431 = r9429 - r9430;
        double r9432 = r9428 * r9431;
        double r9433 = z;
        double r9434 = t;
        double r9435 = r9433 - r9434;
        double r9436 = r9432 / r9435;
        double r9437 = a;
        double r9438 = 120.0;
        double r9439 = r9437 * r9438;
        double r9440 = r9436 + r9439;
        return r9440;
}

Reproduce

Please include this information when filing a bug report:

herbie shell --seed 2019194 
(FPCore (x y z t a)
  :name "Data.Colour.RGB:hslsv from colour-2.3.3, B"

  :herbie-target
  (+ (/ 60.0 (/ (- z t) (- x y))) (* a 120.0))

  (+ (/ (* 60.0 (- x y)) (- z t)) (* a 120.0)))

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	220	0
run-improve47	/data/pavpan/nightlies/herbie/various-cleanup/src/mainloop.rkt	342	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