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

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

double f(double x, double y, double z, double t, double a) {
        double r9517 = x;
        double r9518 = y;
        double r9519 = z;
        double r9520 = r9518 - r9519;
        double r9521 = t;
        double r9522 = r9521 - r9517;
        double r9523 = r9520 * r9522;
        double r9524 = a;
        double r9525 = r9524 - r9519;
        double r9526 = r9523 / r9525;
        double r9527 = r9517 + r9526;
        return r9527;
}

Reproduce

Please include this information when filing a bug report:

herbie shell --seed 2019191 +o rules:numerics
(FPCore (x y z t a)
  :name "Graphics.Rendering.Chart.Axis.Types:invLinMap from Chart-1.5.3"

  :herbie-target
  (if (< z -1.2536131056095036e+188) (- t (* (/ y z) (- t x))) (if (< z 4.446702369113811e+64) (+ x (/ (- y z) (/ (- a z) (- t x)))) (- t (* (/ y z) (- t x)))))

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

Backtrace

get-representation: Unknown representation #f		L	C
loop	/data/pavpan/nightlies/herbie/interface2/src/points.rkt	122	4
prepare-points	/data/pavpan/nightlies/herbie/interface2/src/points.rkt	146	0
setup-prog!34	/data/pavpan/nightlies/herbie/interface2/src/mainloop.rkt	67	0
run-improve43	/data/pavpan/nightlies/herbie/interface2/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