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

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

double f(double x, double y, double z) {
        double r8859 = x;
        double r8860 = y;
        double r8861 = r8859 * r8860;
        double r8862 = z;
        double r8863 = r8860 * r8862;
        double r8864 = r8861 - r8863;
        double r8865 = r8860 * r8860;
        double r8866 = r8864 - r8865;
        double r8867 = r8866 + r8865;
        return r8867;
}

Reproduce

Please include this information when filing a bug report:

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

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

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

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