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

\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 r266119457 = x;
        double r266119458 = y;
        double r266119459 = r266119457 * r266119458;
        double r266119460 = z;
        double r266119461 = r266119458 * r266119460;
        double r266119462 = r266119459 - r266119461;
        double r266119463 = r266119458 * r266119458;
        double r266119464 = r266119462 - r266119463;
        double r266119465 = r266119464 + r266119463;
        return r266119465;
}

Reproduce

Please include this information when filing a bug report:

herbie shell --seed 2019173 
(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

hash-ref: no value found for key key: #<enode 401(401)>		L	C
for-loop	/data/pavpan/nightlies/herbie/various-cleanup/src/core/simplify.rkt	197	2
extractor-extract	/data/pavpan/nightlies/herbie/various-cleanup/src/core/simplify.rkt	196	0
for-loop	/data/pavpan/nightlies/herbie/various-cleanup/src/core/simplify.rkt	35	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-iter!	/data/pavpan/nightlies/herbie/various-cleanup/src/mainloop.rkt	320	0
for-loop	/data/pavpan/nightlies/herbie/various-cleanup/src/mainloop.rkt	354	4
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