?

\[\frac{\cos \left(2 \cdot x\right)}{{c}^{2} \cdot \left(\left(x \cdot {s}^{2}\right) \cdot x\right)} \]
(FPCore (x c s)
 :precision binary64
 (/ (cos (* 2.0 x)) (* (pow c 2.0) (* (* x (pow s 2.0)) x))))
double code(double x, double c, double s) {
	return cos((2.0 * x)) / (pow(c, 2.0) * ((x * pow(s, 2.0)) * x));
}
real(8) function code(x, c, s)
    real(8), intent (in) :: x
    real(8), intent (in) :: c
    real(8), intent (in) :: s
    code = cos((2.0d0 * x)) / ((c ** 2.0d0) * ((x * (s ** 2.0d0)) * x))
end function
public static double code(double x, double c, double s) {
	return Math.cos((2.0 * x)) / (Math.pow(c, 2.0) * ((x * Math.pow(s, 2.0)) * x));
}
def code(x, c, s):
	return math.cos((2.0 * x)) / (math.pow(c, 2.0) * ((x * math.pow(s, 2.0)) * x))
function code(x, c, s)
	return Float64(cos(Float64(2.0 * x)) / Float64((c ^ 2.0) * Float64(Float64(x * (s ^ 2.0)) * x)))
end
function tmp = code(x, c, s)
	tmp = cos((2.0 * x)) / ((c ^ 2.0) * ((x * (s ^ 2.0)) * x));
end
code[x_, c_, s_] := N[(N[Cos[N[(2.0 * x), $MachinePrecision]], $MachinePrecision] / N[(N[Power[c, 2.0], $MachinePrecision] * N[(N[(x * N[Power[s, 2.0], $MachinePrecision]), $MachinePrecision] * x), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]
\frac{\cos \left(2 \cdot x\right)}{{c}^{2} \cdot \left(\left(x \cdot {s}^{2}\right) \cdot x\right)}

Reproduce?

Please include this information when filing a bug report:

herbie shell --seed 2023098 
(FPCore (x c s)
  :name "mixedcos"
  :precision binary64
  (/ (cos (* 2.0 x)) (* (pow c 2.0) (* (* x (pow s 2.0)) x))))

Backtrace

hash-ref: no value found for key key: 'falseLC
(unnamed)/home/nightlies/herbie/using-ruler-nightlies/src/syntax/syntax.rkt2302
f336.../match/compiler.rkt54840
expand-parametric/home/nightlies/herbie/using-ruler-nightlies/src/syntax/sugar.rkt620
(unnamed)/home/nightlies/herbie/using-ruler-nightlies/src/core/egg-herbie.rkt2559
rule->egg-rules/home/nightlies/herbie/using-ruler-nightlies/src/core/egg-herbie.rkt2240
expand-rules/home/nightlies/herbie/using-ruler-nightlies/src/core/egg-herbie.rkt4880
egraph-run-rules/home/nightlies/herbie/using-ruler-nightlies/src/core/egg-herbie.rkt5090
(unnamed)/home/nightlies/herbie/using-ruler-nightlies/src/core/simplify.rkt583
with-egraph/home/nightlies/herbie/using-ruler-nightlies/src/core/egg-herbie.rkt3330
simplify-batch/home/nightlies/herbie/using-ruler-nightlies/src/core/simplify.rkt230
(unnamed)/usr/share/racket/collects/racket/contract/private/arrow-higher-order.rkt37933
get-swaps/home/nightlies/herbie/using-ruler-nightlies/src/symmetry.rkt60
connected-components/home/nightlies/herbie/using-ruler-nightlies/src/symmetry.rkt180
run-improve!/home/nightlies/herbie/using-ruler-nightlies/src/mainloop.rkt3200
run-herbie/home/nightlies/herbie/using-ruler-nightlies/src/sandbox.rkt570
(unnamed)/home/nightlies/herbie/using-ruler-nightlies/src/sandbox.rkt1336
(unnamed)/usr/share/racket/pkgs/profile-lib/main.rkt4010
profile-thunk/usr/share/racket/pkgs/profile-lib/main.rkt90
(unnamed)/usr/share/racket/collects/racket/engine.rkt4224