\[\left(\left(x \cdot y - y \cdot y\right) + y \cdot y\right) - y \cdot z\]

\left(\left(x \cdot y - y \cdot y\right) + y \cdot y\right) - y \cdot z

double f(double x, double y, double z) {
        double r8428 = x;
        double r8429 = y;
        double r8430 = r8428 * r8429;
        double r8431 = r8429 * r8429;
        double r8432 = r8430 - r8431;
        double r8433 = r8432 + r8431;
        double r8434 = z;
        double r8435 = r8429 * r8434;
        double r8436 = r8433 - r8435;
        return r8436;
}

Reproduce

Please include this information when filing a bug report:

herbie shell --seed 2019179 +o rules:numerics
(FPCore (x y z)
  :name "Linear.Quaternion:$c/ from linear-1.19.1.3, D"

  :herbie-target
  (* (- x z) y)

  (- (+ (- (* x y) (* y y)) (* y y)) (* y z)))

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