\[\left(J \cdot \left(e^{\ell} - e^{-\ell}\right)\right) \cdot \cos \left(\frac{K}{2}\right) + U\]

\left(J \cdot \left(e^{\ell} - e^{-\ell}\right)\right) \cdot \cos \left(\frac{K}{2}\right) + U

double f(double J, double l, double K, double U) {
        double r8152 = J;
        double r8153 = l;
        double r8154 = exp(r8153);
        double r8155 = -r8153;
        double r8156 = exp(r8155);
        double r8157 = r8154 - r8156;
        double r8158 = r8152 * r8157;
        double r8159 = K;
        double r8160 = 2.0;
        double r8161 = r8159 / r8160;
        double r8162 = cos(r8161);
        double r8163 = r8158 * r8162;
        double r8164 = U;
        double r8165 = r8163 + r8164;
        return r8165;
}

Reproduce

Please include this information when filing a bug report:

herbie shell --seed 2019179 
(FPCore (J l K U)
  :name "Maksimov and Kolovsky, Equation (4)"
  (+ (* (* J (- (exp l) (exp (- l)))) (cos (/ K 2.0))) U))

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