Jmat.Real.erfi, branch x greater than or equal to 5

Average Error: 2.8 → 1.2

Time: 12.7s

Precision: binary64

Cost: 46336

\[x \geq 0.5\]

Math

\[\left(\frac{1}{\sqrt{\pi}} \cdot e^{\left|x\right| \cdot \left|x\right|}\right) \cdot \left(\left(\left(\frac{1}{\left|x\right|} + \frac{1}{2} \cdot \left(\left(\frac{1}{\left|x\right|} \cdot \frac{1}{\left|x\right|}\right) \cdot \frac{1}{\left|x\right|}\right)\right) + \frac{3}{4} \cdot \left(\left(\left(\left(\frac{1}{\left|x\right|} \cdot \frac{1}{\left|x\right|}\right) \cdot \frac{1}{\left|x\right|}\right) \cdot \frac{1}{\left|x\right|}\right) \cdot \frac{1}{\left|x\right|}\right)\right) + \frac{15}{8} \cdot \left(\left(\left(\left(\left(\left(\frac{1}{\left|x\right|} \cdot \frac{1}{\left|x\right|}\right) \cdot \frac{1}{\left|x\right|}\right) \cdot \frac{1}{\left|x\right|}\right) \cdot \frac{1}{\left|x\right|}\right) \cdot \frac{1}{\left|x\right|}\right) \cdot \frac{1}{\left|x\right|}\right)\right) \]

↓

\[{\left(e^{x}\right)}^{x} \cdot \left(\sqrt{\frac{1}{\pi}} \cdot \left(\left(\frac{0.5}{{x}^{3}} + \frac{1.875}{{x}^{7}}\right) + \left(\frac{1}{x} + \frac{0.75}{{x}^{5}}\right)\right)\right) \]

FPCore

(FPCore (x)
 :precision binary64
 (*
  (* (/ 1.0 (sqrt PI)) (exp (* (fabs x) (fabs x))))
  (+
   (+
    (+
     (/ 1.0 (fabs x))
     (*
      (/ 1.0 2.0)
      (* (* (/ 1.0 (fabs x)) (/ 1.0 (fabs x))) (/ 1.0 (fabs x)))))
    (*
     (/ 3.0 4.0)
     (*
      (*
       (* (* (/ 1.0 (fabs x)) (/ 1.0 (fabs x))) (/ 1.0 (fabs x)))
       (/ 1.0 (fabs x)))
      (/ 1.0 (fabs x)))))
   (*
    (/ 15.0 8.0)
    (*
     (*
      (*
       (*
        (* (* (/ 1.0 (fabs x)) (/ 1.0 (fabs x))) (/ 1.0 (fabs x)))
        (/ 1.0 (fabs x)))
       (/ 1.0 (fabs x)))
      (/ 1.0 (fabs x)))
     (/ 1.0 (fabs x)))))))

↓

(FPCore (x)
 :precision binary64
 (*
  (pow (exp x) x)
  (*
   (sqrt (/ 1.0 PI))
   (+
    (+ (/ 0.5 (pow x 3.0)) (/ 1.875 (pow x 7.0)))
    (+ (/ 1.0 x) (/ 0.75 (pow x 5.0)))))))

C

double code(double x) {
	return ((1.0 / sqrt(((double) M_PI))) * exp((fabs(x) * fabs(x)))) * ((((1.0 / fabs(x)) + ((1.0 / 2.0) * (((1.0 / fabs(x)) * (1.0 / fabs(x))) * (1.0 / fabs(x))))) + ((3.0 / 4.0) * (((((1.0 / fabs(x)) * (1.0 / fabs(x))) * (1.0 / fabs(x))) * (1.0 / fabs(x))) * (1.0 / fabs(x))))) + ((15.0 / 8.0) * (((((((1.0 / fabs(x)) * (1.0 / fabs(x))) * (1.0 / fabs(x))) * (1.0 / fabs(x))) * (1.0 / fabs(x))) * (1.0 / fabs(x))) * (1.0 / fabs(x)))));
}

↓

double code(double x) {
	return pow(exp(x), x) * (sqrt((1.0 / ((double) M_PI))) * (((0.5 / pow(x, 3.0)) + (1.875 / pow(x, 7.0))) + ((1.0 / x) + (0.75 / pow(x, 5.0)))));
}

Java

public static double code(double x) {
	return ((1.0 / Math.sqrt(Math.PI)) * Math.exp((Math.abs(x) * Math.abs(x)))) * ((((1.0 / Math.abs(x)) + ((1.0 / 2.0) * (((1.0 / Math.abs(x)) * (1.0 / Math.abs(x))) * (1.0 / Math.abs(x))))) + ((3.0 / 4.0) * (((((1.0 / Math.abs(x)) * (1.0 / Math.abs(x))) * (1.0 / Math.abs(x))) * (1.0 / Math.abs(x))) * (1.0 / Math.abs(x))))) + ((15.0 / 8.0) * (((((((1.0 / Math.abs(x)) * (1.0 / Math.abs(x))) * (1.0 / Math.abs(x))) * (1.0 / Math.abs(x))) * (1.0 / Math.abs(x))) * (1.0 / Math.abs(x))) * (1.0 / Math.abs(x)))));
}

↓

public static double code(double x) {
	return Math.pow(Math.exp(x), x) * (Math.sqrt((1.0 / Math.PI)) * (((0.5 / Math.pow(x, 3.0)) + (1.875 / Math.pow(x, 7.0))) + ((1.0 / x) + (0.75 / Math.pow(x, 5.0)))));
}

Python

def code(x):
	return ((1.0 / math.sqrt(math.pi)) * math.exp((math.fabs(x) * math.fabs(x)))) * ((((1.0 / math.fabs(x)) + ((1.0 / 2.0) * (((1.0 / math.fabs(x)) * (1.0 / math.fabs(x))) * (1.0 / math.fabs(x))))) + ((3.0 / 4.0) * (((((1.0 / math.fabs(x)) * (1.0 / math.fabs(x))) * (1.0 / math.fabs(x))) * (1.0 / math.fabs(x))) * (1.0 / math.fabs(x))))) + ((15.0 / 8.0) * (((((((1.0 / math.fabs(x)) * (1.0 / math.fabs(x))) * (1.0 / math.fabs(x))) * (1.0 / math.fabs(x))) * (1.0 / math.fabs(x))) * (1.0 / math.fabs(x))) * (1.0 / math.fabs(x)))))

↓

def code(x):
	return math.pow(math.exp(x), x) * (math.sqrt((1.0 / math.pi)) * (((0.5 / math.pow(x, 3.0)) + (1.875 / math.pow(x, 7.0))) + ((1.0 / x) + (0.75 / math.pow(x, 5.0)))))

Julia

function code(x)
	return Float64(Float64(Float64(1.0 / sqrt(pi)) * exp(Float64(abs(x) * abs(x)))) * Float64(Float64(Float64(Float64(1.0 / abs(x)) + Float64(Float64(1.0 / 2.0) * Float64(Float64(Float64(1.0 / abs(x)) * Float64(1.0 / abs(x))) * Float64(1.0 / abs(x))))) + Float64(Float64(3.0 / 4.0) * Float64(Float64(Float64(Float64(Float64(1.0 / abs(x)) * Float64(1.0 / abs(x))) * Float64(1.0 / abs(x))) * Float64(1.0 / abs(x))) * Float64(1.0 / abs(x))))) + Float64(Float64(15.0 / 8.0) * Float64(Float64(Float64(Float64(Float64(Float64(Float64(1.0 / abs(x)) * Float64(1.0 / abs(x))) * Float64(1.0 / abs(x))) * Float64(1.0 / abs(x))) * Float64(1.0 / abs(x))) * Float64(1.0 / abs(x))) * Float64(1.0 / abs(x))))))
end

↓

function code(x)
	return Float64((exp(x) ^ x) * Float64(sqrt(Float64(1.0 / pi)) * Float64(Float64(Float64(0.5 / (x ^ 3.0)) + Float64(1.875 / (x ^ 7.0))) + Float64(Float64(1.0 / x) + Float64(0.75 / (x ^ 5.0))))))
end

MATLAB

function tmp = code(x)
	tmp = ((1.0 / sqrt(pi)) * exp((abs(x) * abs(x)))) * ((((1.0 / abs(x)) + ((1.0 / 2.0) * (((1.0 / abs(x)) * (1.0 / abs(x))) * (1.0 / abs(x))))) + ((3.0 / 4.0) * (((((1.0 / abs(x)) * (1.0 / abs(x))) * (1.0 / abs(x))) * (1.0 / abs(x))) * (1.0 / abs(x))))) + ((15.0 / 8.0) * (((((((1.0 / abs(x)) * (1.0 / abs(x))) * (1.0 / abs(x))) * (1.0 / abs(x))) * (1.0 / abs(x))) * (1.0 / abs(x))) * (1.0 / abs(x)))));
end

↓

function tmp = code(x)
	tmp = (exp(x) ^ x) * (sqrt((1.0 / pi)) * (((0.5 / (x ^ 3.0)) + (1.875 / (x ^ 7.0))) + ((1.0 / x) + (0.75 / (x ^ 5.0)))));
end

Wolfram

code[x_] := N[(N[(N[(1.0 / N[Sqrt[Pi], $MachinePrecision]), $MachinePrecision] * N[Exp[N[(N[Abs[x], $MachinePrecision] * N[Abs[x], $MachinePrecision]), $MachinePrecision]], $MachinePrecision]), $MachinePrecision] * N[(N[(N[(N[(1.0 / N[Abs[x], $MachinePrecision]), $MachinePrecision] + N[(N[(1.0 / 2.0), $MachinePrecision] * N[(N[(N[(1.0 / N[Abs[x], $MachinePrecision]), $MachinePrecision] * N[(1.0 / N[Abs[x], $MachinePrecision]), $MachinePrecision]), $MachinePrecision] * N[(1.0 / N[Abs[x], $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision] + N[(N[(3.0 / 4.0), $MachinePrecision] * N[(N[(N[(N[(N[(1.0 / N[Abs[x], $MachinePrecision]), $MachinePrecision] * N[(1.0 / N[Abs[x], $MachinePrecision]), $MachinePrecision]), $MachinePrecision] * N[(1.0 / N[Abs[x], $MachinePrecision]), $MachinePrecision]), $MachinePrecision] * N[(1.0 / N[Abs[x], $MachinePrecision]), $MachinePrecision]), $MachinePrecision] * N[(1.0 / N[Abs[x], $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision] + N[(N[(15.0 / 8.0), $MachinePrecision] * N[(N[(N[(N[(N[(N[(N[(1.0 / N[Abs[x], $MachinePrecision]), $MachinePrecision] * N[(1.0 / N[Abs[x], $MachinePrecision]), $MachinePrecision]), $MachinePrecision] * N[(1.0 / N[Abs[x], $MachinePrecision]), $MachinePrecision]), $MachinePrecision] * N[(1.0 / N[Abs[x], $MachinePrecision]), $MachinePrecision]), $MachinePrecision] * N[(1.0 / N[Abs[x], $MachinePrecision]), $MachinePrecision]), $MachinePrecision] * N[(1.0 / N[Abs[x], $MachinePrecision]), $MachinePrecision]), $MachinePrecision] * N[(1.0 / N[Abs[x], $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]

↓

code[x_] := N[(N[Power[N[Exp[x], $MachinePrecision], x], $MachinePrecision] * N[(N[Sqrt[N[(1.0 / Pi), $MachinePrecision]], $MachinePrecision] * N[(N[(N[(0.5 / N[Power[x, 3.0], $MachinePrecision]), $MachinePrecision] + N[(1.875 / N[Power[x, 7.0], $MachinePrecision]), $MachinePrecision]), $MachinePrecision] + N[(N[(1.0 / x), $MachinePrecision] + N[(0.75 / N[Power[x, 5.0], $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]

Derivation

1. Initial program 2.8

   \[\left(\frac{1}{\sqrt{\pi}} \cdot e^{\left|x\right| \cdot \left|x\right|}\right) \cdot \left(\left(\left(\frac{1}{\left|x\right|} + \frac{1}{2} \cdot \left(\left(\frac{1}{\left|x\right|} \cdot \frac{1}{\left|x\right|}\right) \cdot \frac{1}{\left|x\right|}\right)\right) + \frac{3}{4} \cdot \left(\left(\left(\left(\frac{1}{\left|x\right|} \cdot \frac{1}{\left|x\right|}\right) \cdot \frac{1}{\left|x\right|}\right) \cdot \frac{1}{\left|x\right|}\right) \cdot \frac{1}{\left|x\right|}\right)\right) + \frac{15}{8} \cdot \left(\left(\left(\left(\left(\left(\frac{1}{\left|x\right|} \cdot \frac{1}{\left|x\right|}\right) \cdot \frac{1}{\left|x\right|}\right) \cdot \frac{1}{\left|x\right|}\right) \cdot \frac{1}{\left|x\right|}\right) \cdot \frac{1}{\left|x\right|}\right) \cdot \frac{1}{\left|x\right|}\right)\right) \]

2. Simplified 1.4

   \[\leadsto \color{blue}{{\left(e^{x}\right)}^{x} \cdot \frac{\frac{1 + \frac{0.5}{x \cdot x}}{\left|x\right|} + {\left(\frac{1}{\left|x\right|}\right)}^{5} \cdot \left(0.75 + \frac{1.875}{x \cdot x}\right)}{\sqrt{\pi}}} \]
   Proof
   (*.f64 (pow.f64 (exp.f64 x) x) (/.f64 (+.f64 (/.f64 (+.f64 1 (/.f64 1/2 (*.f64 x x))) (fabs.f64 x)) (*.f64 (pow.f64 (/.f64 1 (fabs.f64 x)) 5) (+.f64 3/4 (/.f64 15/8 (*.f64 x x))))) (sqrt.f64 (PI.f64)))): 0 points increase in error, 0 points decrease in error
   (*.f64 (Rewrite<= exp-prod_binary64 (exp.f64 (*.f64 x x))) (/.f64 (+.f64 (/.f64 (+.f64 1 (/.f64 1/2 (*.f64 x x))) (fabs.f64 x)) (*.f64 (pow.f64 (/.f64 1 (fabs.f64 x)) 5) (+.f64 3/4 (/.f64 15/8 (*.f64 x x))))) (sqrt.f64 (PI.f64)))): 165 points increase in error, 24 points decrease in error
   (*.f64 (exp.f64 (Rewrite<= sqr-abs_binary64 (*.f64 (fabs.f64 x) (fabs.f64 x)))) (/.f64 (+.f64 (/.f64 (+.f64 1 (/.f64 1/2 (*.f64 x x))) (fabs.f64 x)) (*.f64 (pow.f64 (/.f64 1 (fabs.f64 x)) 5) (+.f64 3/4 (/.f64 15/8 (*.f64 x x))))) (sqrt.f64 (PI.f64)))): 0 points increase in error, 0 points decrease in error
   (*.f64 (exp.f64 (*.f64 (fabs.f64 x) (fabs.f64 x))) (/.f64 (+.f64 (/.f64 (+.f64 1 (/.f64 (Rewrite<= metadata-eval (*.f64 1/2 1)) (*.f64 x x))) (fabs.f64 x)) (*.f64 (pow.f64 (/.f64 1 (fabs.f64 x)) 5) (+.f64 3/4 (/.f64 15/8 (*.f64 x x))))) (sqrt.f64 (PI.f64)))): 0 points increase in error, 0 points decrease in error
   (*.f64 (exp.f64 (*.f64 (fabs.f64 x) (fabs.f64 x))) (/.f64 (+.f64 (/.f64 (+.f64 1 (/.f64 (*.f64 (Rewrite<= metadata-eval (/.f64 1 2)) 1) (*.f64 x x))) (fabs.f64 x)) (*.f64 (pow.f64 (/.f64 1 (fabs.f64 x)) 5) (+.f64 3/4 (/.f64 15/8 (*.f64 x x))))) (sqrt.f64 (PI.f64)))): 0 points increase in error, 0 points decrease in error
   (*.f64 (exp.f64 (*.f64 (fabs.f64 x) (fabs.f64 x))) (/.f64 (+.f64 (/.f64 (+.f64 1 (/.f64 (*.f64 (/.f64 1 2) 1) (Rewrite<= sqr-abs_binary64 (*.f64 (fabs.f64 x) (fabs.f64 x))))) (fabs.f64 x)) (*.f64 (pow.f64 (/.f64 1 (fabs.f64 x)) 5) (+.f64 3/4 (/.f64 15/8 (*.f64 x x))))) (sqrt.f64 (PI.f64)))): 0 points increase in error, 0 points decrease in error
   (*.f64 (exp.f64 (*.f64 (fabs.f64 x) (fabs.f64 x))) (/.f64 (+.f64 (/.f64 (+.f64 1 (Rewrite<= associate-*r/_binary64 (*.f64 (/.f64 1 2) (/.f64 1 (*.f64 (fabs.f64 x) (fabs.f64 x)))))) (fabs.f64 x)) (*.f64 (pow.f64 (/.f64 1 (fabs.f64 x)) 5) (+.f64 3/4 (/.f64 15/8 (*.f64 x x))))) (sqrt.f64 (PI.f64)))): 0 points increase in error, 0 points decrease in error
   (*.f64 (exp.f64 (*.f64 (fabs.f64 x) (fabs.f64 x))) (/.f64 (+.f64 (/.f64 (+.f64 1 (*.f64 (/.f64 1 2) (Rewrite<= associate-/l/_binary64 (/.f64 (/.f64 1 (fabs.f64 x)) (fabs.f64 x))))) (fabs.f64 x)) (*.f64 (pow.f64 (/.f64 1 (fabs.f64 x)) 5) (+.f64 3/4 (/.f64 15/8 (*.f64 x x))))) (sqrt.f64 (PI.f64)))): 7 points increase in error, 0 points decrease in error
   (*.f64 (exp.f64 (*.f64 (fabs.f64 x) (fabs.f64 x))) (/.f64 (+.f64 (/.f64 (+.f64 1 (*.f64 (/.f64 1 2) (/.f64 (Rewrite<= *-lft-identity_binary64 (*.f64 1 (/.f64 1 (fabs.f64 x)))) (fabs.f64 x)))) (fabs.f64 x)) (*.f64 (pow.f64 (/.f64 1 (fabs.f64 x)) 5) (+.f64 3/4 (/.f64 15/8 (*.f64 x x))))) (sqrt.f64 (PI.f64)))): 0 points increase in error, 0 points decrease in error
   (*.f64 (exp.f64 (*.f64 (fabs.f64 x) (fabs.f64 x))) (/.f64 (+.f64 (/.f64 (+.f64 1 (*.f64 (/.f64 1 2) (Rewrite<= associate-*l/_binary64 (*.f64 (/.f64 1 (fabs.f64 x)) (/.f64 1 (fabs.f64 x)))))) (fabs.f64 x)) (*.f64 (pow.f64 (/.f64 1 (fabs.f64 x)) 5) (+.f64 3/4 (/.f64 15/8 (*.f64 x x))))) (sqrt.f64 (PI.f64)))): 2 points increase in error, 2 points decrease in error
   (*.f64 (exp.f64 (*.f64 (fabs.f64 x) (fabs.f64 x))) (/.f64 (+.f64 (/.f64 (Rewrite<= +-commutative_binary64 (+.f64 (*.f64 (/.f64 1 2) (*.f64 (/.f64 1 (fabs.f64 x)) (/.f64 1 (fabs.f64 x)))) 1)) (fabs.f64 x)) (*.f64 (pow.f64 (/.f64 1 (fabs.f64 x)) 5) (+.f64 3/4 (/.f64 15/8 (*.f64 x x))))) (sqrt.f64 (PI.f64)))): 0 points increase in error, 0 points decrease in error
   (*.f64 (exp.f64 (*.f64 (fabs.f64 x) (fabs.f64 x))) (/.f64 (+.f64 (/.f64 (Rewrite<= *-rgt-identity_binary64 (*.f64 (+.f64 (*.f64 (/.f64 1 2) (*.f64 (/.f64 1 (fabs.f64 x)) (/.f64 1 (fabs.f64 x)))) 1) 1)) (fabs.f64 x)) (*.f64 (pow.f64 (/.f64 1 (fabs.f64 x)) 5) (+.f64 3/4 (/.f64 15/8 (*.f64 x x))))) (sqrt.f64 (PI.f64)))): 0 points increase in error, 0 points decrease in error
   (*.f64 (exp.f64 (*.f64 (fabs.f64 x) (fabs.f64 x))) (/.f64 (+.f64 (Rewrite<= associate-*r/_binary64 (*.f64 (+.f64 (*.f64 (/.f64 1 2) (*.f64 (/.f64 1 (fabs.f64 x)) (/.f64 1 (fabs.f64 x)))) 1) (/.f64 1 (fabs.f64 x)))) (*.f64 (pow.f64 (/.f64 1 (fabs.f64 x)) 5) (+.f64 3/4 (/.f64 15/8 (*.f64 x x))))) (sqrt.f64 (PI.f64)))): 19 points increase in error, 20 points decrease in error
   (*.f64 (exp.f64 (*.f64 (fabs.f64 x) (fabs.f64 x))) (/.f64 (+.f64 (Rewrite<= distribute-rgt1-in_binary64 (+.f64 (/.f64 1 (fabs.f64 x)) (*.f64 (*.f64 (/.f64 1 2) (*.f64 (/.f64 1 (fabs.f64 x)) (/.f64 1 (fabs.f64 x)))) (/.f64 1 (fabs.f64 x))))) (*.f64 (pow.f64 (/.f64 1 (fabs.f64 x)) 5) (+.f64 3/4 (/.f64 15/8 (*.f64 x x))))) (sqrt.f64 (PI.f64)))): 24 points increase in error, 34 points decrease in error
   (*.f64 (exp.f64 (*.f64 (fabs.f64 x) (fabs.f64 x))) (/.f64 (+.f64 (+.f64 (/.f64 1 (fabs.f64 x)) (Rewrite<= associate-*r*_binary64 (*.f64 (/.f64 1 2) (*.f64 (*.f64 (/.f64 1 (fabs.f64 x)) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x)))))) (*.f64 (pow.f64 (/.f64 1 (fabs.f64 x)) 5) (+.f64 3/4 (/.f64 15/8 (*.f64 x x))))) (sqrt.f64 (PI.f64)))): 0 points increase in error, 0 points decrease in error
   (*.f64 (exp.f64 (*.f64 (fabs.f64 x) (fabs.f64 x))) (/.f64 (+.f64 (+.f64 (/.f64 1 (fabs.f64 x)) (*.f64 (/.f64 1 2) (*.f64 (*.f64 (/.f64 1 (fabs.f64 x)) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))))) (*.f64 (pow.f64 (/.f64 1 (fabs.f64 x)) (Rewrite<= metadata-eval (*.f64 2 5/2))) (+.f64 3/4 (/.f64 15/8 (*.f64 x x))))) (sqrt.f64 (PI.f64)))): 0 points increase in error, 0 points decrease in error
   (*.f64 (exp.f64 (*.f64 (fabs.f64 x) (fabs.f64 x))) (/.f64 (+.f64 (+.f64 (/.f64 1 (fabs.f64 x)) (*.f64 (/.f64 1 2) (*.f64 (*.f64 (/.f64 1 (fabs.f64 x)) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))))) (*.f64 (pow.f64 (/.f64 1 (fabs.f64 x)) (*.f64 2 (Rewrite<= metadata-eval (+.f64 3/2 1)))) (+.f64 3/4 (/.f64 15/8 (*.f64 x x))))) (sqrt.f64 (PI.f64)))): 0 points increase in error, 0 points decrease in error
   (*.f64 (exp.f64 (*.f64 (fabs.f64 x) (fabs.f64 x))) (/.f64 (+.f64 (+.f64 (/.f64 1 (fabs.f64 x)) (*.f64 (/.f64 1 2) (*.f64 (*.f64 (/.f64 1 (fabs.f64 x)) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))))) (*.f64 (pow.f64 (/.f64 1 (fabs.f64 x)) (*.f64 2 (+.f64 (Rewrite<= metadata-eval (/.f64 3 2)) 1))) (+.f64 3/4 (/.f64 15/8 (*.f64 x x))))) (sqrt.f64 (PI.f64)))): 0 points increase in error, 0 points decrease in error
   (*.f64 (exp.f64 (*.f64 (fabs.f64 x) (fabs.f64 x))) (/.f64 (+.f64 (+.f64 (/.f64 1 (fabs.f64 x)) (*.f64 (/.f64 1 2) (*.f64 (*.f64 (/.f64 1 (fabs.f64 x)) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))))) (*.f64 (Rewrite<= pow-sqr_binary64 (*.f64 (pow.f64 (/.f64 1 (fabs.f64 x)) (+.f64 (/.f64 3 2) 1)) (pow.f64 (/.f64 1 (fabs.f64 x)) (+.f64 (/.f64 3 2) 1)))) (+.f64 3/4 (/.f64 15/8 (*.f64 x x))))) (sqrt.f64 (PI.f64)))): 5 points increase in error, 8 points decrease in error
   (*.f64 (exp.f64 (*.f64 (fabs.f64 x) (fabs.f64 x))) (/.f64 (+.f64 (+.f64 (/.f64 1 (fabs.f64 x)) (*.f64 (/.f64 1 2) (*.f64 (*.f64 (/.f64 1 (fabs.f64 x)) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))))) (*.f64 (*.f64 (Rewrite<= pow-plus_binary64 (*.f64 (pow.f64 (/.f64 1 (fabs.f64 x)) (/.f64 3 2)) (/.f64 1 (fabs.f64 x)))) (pow.f64 (/.f64 1 (fabs.f64 x)) (+.f64 (/.f64 3 2) 1))) (+.f64 3/4 (/.f64 15/8 (*.f64 x x))))) (sqrt.f64 (PI.f64)))): 4 points increase in error, 4 points decrease in error
   (*.f64 (exp.f64 (*.f64 (fabs.f64 x) (fabs.f64 x))) (/.f64 (+.f64 (+.f64 (/.f64 1 (fabs.f64 x)) (*.f64 (/.f64 1 2) (*.f64 (*.f64 (/.f64 1 (fabs.f64 x)) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))))) (*.f64 (*.f64 (*.f64 (pow.f64 (/.f64 1 (fabs.f64 x)) (/.f64 3 2)) (/.f64 1 (fabs.f64 x))) (Rewrite<= pow-plus_binary64 (*.f64 (pow.f64 (/.f64 1 (fabs.f64 x)) (/.f64 3 2)) (/.f64 1 (fabs.f64 x))))) (+.f64 3/4 (/.f64 15/8 (*.f64 x x))))) (sqrt.f64 (PI.f64)))): 4 points increase in error, 4 points decrease in error
   (*.f64 (exp.f64 (*.f64 (fabs.f64 x) (fabs.f64 x))) (/.f64 (+.f64 (+.f64 (/.f64 1 (fabs.f64 x)) (*.f64 (/.f64 1 2) (*.f64 (*.f64 (/.f64 1 (fabs.f64 x)) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))))) (*.f64 (Rewrite<= unswap-sqr_binary64 (*.f64 (*.f64 (pow.f64 (/.f64 1 (fabs.f64 x)) (/.f64 3 2)) (pow.f64 (/.f64 1 (fabs.f64 x)) (/.f64 3 2))) (*.f64 (/.f64 1 (fabs.f64 x)) (/.f64 1 (fabs.f64 x))))) (+.f64 3/4 (/.f64 15/8 (*.f64 x x))))) (sqrt.f64 (PI.f64)))): 13 points increase in error, 10 points decrease in error
   (*.f64 (exp.f64 (*.f64 (fabs.f64 x) (fabs.f64 x))) (/.f64 (+.f64 (+.f64 (/.f64 1 (fabs.f64 x)) (*.f64 (/.f64 1 2) (*.f64 (*.f64 (/.f64 1 (fabs.f64 x)) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))))) (*.f64 (*.f64 (Rewrite<= sqr-pow_binary64 (pow.f64 (/.f64 1 (fabs.f64 x)) 3)) (*.f64 (/.f64 1 (fabs.f64 x)) (/.f64 1 (fabs.f64 x)))) (+.f64 3/4 (/.f64 15/8 (*.f64 x x))))) (sqrt.f64 (PI.f64)))): 9 points increase in error, 8 points decrease in error
   (*.f64 (exp.f64 (*.f64 (fabs.f64 x) (fabs.f64 x))) (/.f64 (+.f64 (+.f64 (/.f64 1 (fabs.f64 x)) (*.f64 (/.f64 1 2) (*.f64 (*.f64 (/.f64 1 (fabs.f64 x)) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))))) (*.f64 (*.f64 (Rewrite<= cube-unmult_binary64 (*.f64 (/.f64 1 (fabs.f64 x)) (*.f64 (/.f64 1 (fabs.f64 x)) (/.f64 1 (fabs.f64 x))))) (*.f64 (/.f64 1 (fabs.f64 x)) (/.f64 1 (fabs.f64 x)))) (+.f64 3/4 (/.f64 15/8 (*.f64 x x))))) (sqrt.f64 (PI.f64)))): 4 points increase in error, 3 points decrease in error
   (*.f64 (exp.f64 (*.f64 (fabs.f64 x) (fabs.f64 x))) (/.f64 (+.f64 (+.f64 (/.f64 1 (fabs.f64 x)) (*.f64 (/.f64 1 2) (*.f64 (*.f64 (/.f64 1 (fabs.f64 x)) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))))) (*.f64 (*.f64 (Rewrite<= associate-*l*_binary64 (*.f64 (*.f64 (/.f64 1 (fabs.f64 x)) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x)))) (*.f64 (/.f64 1 (fabs.f64 x)) (/.f64 1 (fabs.f64 x)))) (+.f64 3/4 (/.f64 15/8 (*.f64 x x))))) (sqrt.f64 (PI.f64)))): 0 points increase in error, 0 points decrease in error
   (*.f64 (exp.f64 (*.f64 (fabs.f64 x) (fabs.f64 x))) (/.f64 (+.f64 (+.f64 (/.f64 1 (fabs.f64 x)) (*.f64 (/.f64 1 2) (*.f64 (*.f64 (/.f64 1 (fabs.f64 x)) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))))) (*.f64 (Rewrite<= associate-*l*_binary64 (*.f64 (*.f64 (*.f64 (*.f64 (/.f64 1 (fabs.f64 x)) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x)))) (+.f64 3/4 (/.f64 15/8 (*.f64 x x))))) (sqrt.f64 (PI.f64)))): 4 points increase in error, 4 points decrease in error
   (*.f64 (exp.f64 (*.f64 (fabs.f64 x) (fabs.f64 x))) (/.f64 (+.f64 (+.f64 (/.f64 1 (fabs.f64 x)) (*.f64 (/.f64 1 2) (*.f64 (*.f64 (/.f64 1 (fabs.f64 x)) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))))) (*.f64 (*.f64 (*.f64 (*.f64 (*.f64 (/.f64 1 (fabs.f64 x)) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))) (+.f64 (Rewrite<= metadata-eval (/.f64 3 4)) (/.f64 15/8 (*.f64 x x))))) (sqrt.f64 (PI.f64)))): 0 points increase in error, 0 points decrease in error
   (*.f64 (exp.f64 (*.f64 (fabs.f64 x) (fabs.f64 x))) (/.f64 (+.f64 (+.f64 (/.f64 1 (fabs.f64 x)) (*.f64 (/.f64 1 2) (*.f64 (*.f64 (/.f64 1 (fabs.f64 x)) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))))) (*.f64 (*.f64 (*.f64 (*.f64 (*.f64 (/.f64 1 (fabs.f64 x)) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))) (+.f64 (/.f64 3 4) (/.f64 (Rewrite<= metadata-eval (/.f64 15 8)) (*.f64 x x))))) (sqrt.f64 (PI.f64)))): 0 points increase in error, 0 points decrease in error
   (*.f64 (exp.f64 (*.f64 (fabs.f64 x) (fabs.f64 x))) (/.f64 (+.f64 (+.f64 (/.f64 1 (fabs.f64 x)) (*.f64 (/.f64 1 2) (*.f64 (*.f64 (/.f64 1 (fabs.f64 x)) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))))) (*.f64 (*.f64 (*.f64 (*.f64 (*.f64 (/.f64 1 (fabs.f64 x)) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))) (+.f64 (/.f64 3 4) (/.f64 (/.f64 15 8) (Rewrite<= sqr-abs_binary64 (*.f64 (fabs.f64 x) (fabs.f64 x))))))) (sqrt.f64 (PI.f64)))): 0 points increase in error, 0 points decrease in error
   (*.f64 (exp.f64 (*.f64 (fabs.f64 x) (fabs.f64 x))) (/.f64 (+.f64 (+.f64 (/.f64 1 (fabs.f64 x)) (*.f64 (/.f64 1 2) (*.f64 (*.f64 (/.f64 1 (fabs.f64 x)) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))))) (*.f64 (*.f64 (*.f64 (*.f64 (*.f64 (/.f64 1 (fabs.f64 x)) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))) (+.f64 (/.f64 3 4) (/.f64 (/.f64 15 8) (*.f64 (Rewrite<= /-rgt-identity_binary64 (/.f64 (fabs.f64 x) 1)) (fabs.f64 x)))))) (sqrt.f64 (PI.f64)))): 0 points increase in error, 0 points decrease in error
   (*.f64 (exp.f64 (*.f64 (fabs.f64 x) (fabs.f64 x))) (/.f64 (+.f64 (+.f64 (/.f64 1 (fabs.f64 x)) (*.f64 (/.f64 1 2) (*.f64 (*.f64 (/.f64 1 (fabs.f64 x)) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))))) (*.f64 (*.f64 (*.f64 (*.f64 (*.f64 (/.f64 1 (fabs.f64 x)) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))) (+.f64 (/.f64 3 4) (/.f64 (/.f64 15 8) (Rewrite<= associate-/r/_binary64 (/.f64 (fabs.f64 x) (/.f64 1 (fabs.f64 x)))))))) (sqrt.f64 (PI.f64)))): 4 points increase in error, 1 points decrease in error
   (*.f64 (exp.f64 (*.f64 (fabs.f64 x) (fabs.f64 x))) (/.f64 (+.f64 (+.f64 (/.f64 1 (fabs.f64 x)) (*.f64 (/.f64 1 2) (*.f64 (*.f64 (/.f64 1 (fabs.f64 x)) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))))) (*.f64 (*.f64 (*.f64 (*.f64 (*.f64 (/.f64 1 (fabs.f64 x)) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))) (+.f64 (/.f64 3 4) (Rewrite<= associate-/l*_binary64 (/.f64 (*.f64 (/.f64 15 8) (/.f64 1 (fabs.f64 x))) (fabs.f64 x)))))) (sqrt.f64 (PI.f64)))): 1 points increase in error, 1 points decrease in error
   (*.f64 (exp.f64 (*.f64 (fabs.f64 x) (fabs.f64 x))) (/.f64 (+.f64 (+.f64 (/.f64 1 (fabs.f64 x)) (*.f64 (/.f64 1 2) (*.f64 (*.f64 (/.f64 1 (fabs.f64 x)) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))))) (*.f64 (*.f64 (*.f64 (*.f64 (*.f64 (/.f64 1 (fabs.f64 x)) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))) (+.f64 (/.f64 3 4) (/.f64 (Rewrite<= *-rgt-identity_binary64 (*.f64 (*.f64 (/.f64 15 8) (/.f64 1 (fabs.f64 x))) 1)) (fabs.f64 x))))) (sqrt.f64 (PI.f64)))): 0 points increase in error, 0 points decrease in error
   (*.f64 (exp.f64 (*.f64 (fabs.f64 x) (fabs.f64 x))) (/.f64 (+.f64 (+.f64 (/.f64 1 (fabs.f64 x)) (*.f64 (/.f64 1 2) (*.f64 (*.f64 (/.f64 1 (fabs.f64 x)) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))))) (*.f64 (*.f64 (*.f64 (*.f64 (*.f64 (/.f64 1 (fabs.f64 x)) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))) (+.f64 (/.f64 3 4) (Rewrite<= associate-*r/_binary64 (*.f64 (*.f64 (/.f64 15 8) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))))))) (sqrt.f64 (PI.f64)))): 4 points increase in error, 1 points decrease in error
   (*.f64 (exp.f64 (*.f64 (fabs.f64 x) (fabs.f64 x))) (/.f64 (+.f64 (+.f64 (/.f64 1 (fabs.f64 x)) (*.f64 (/.f64 1 2) (*.f64 (*.f64 (/.f64 1 (fabs.f64 x)) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))))) (Rewrite<= distribute-rgt-out_binary64 (+.f64 (*.f64 (/.f64 3 4) (*.f64 (*.f64 (*.f64 (*.f64 (/.f64 1 (fabs.f64 x)) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x)))) (*.f64 (*.f64 (*.f64 (/.f64 15 8) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))) (*.f64 (*.f64 (*.f64 (*.f64 (/.f64 1 (fabs.f64 x)) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))))))) (sqrt.f64 (PI.f64)))): 2 points increase in error, 2 points decrease in error
   (*.f64 (exp.f64 (*.f64 (fabs.f64 x) (fabs.f64 x))) (/.f64 (+.f64 (+.f64 (/.f64 1 (fabs.f64 x)) (*.f64 (/.f64 1 2) (*.f64 (*.f64 (/.f64 1 (fabs.f64 x)) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))))) (+.f64 (*.f64 (/.f64 3 4) (*.f64 (*.f64 (*.f64 (*.f64 (/.f64 1 (fabs.f64 x)) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x)))) (Rewrite<= associate-*r*_binary64 (*.f64 (*.f64 (/.f64 15 8) (/.f64 1 (fabs.f64 x))) (*.f64 (/.f64 1 (fabs.f64 x)) (*.f64 (*.f64 (*.f64 (*.f64 (/.f64 1 (fabs.f64 x)) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x)))))))) (sqrt.f64 (PI.f64)))): 2 points increase in error, 2 points decrease in error
   (*.f64 (exp.f64 (*.f64 (fabs.f64 x) (fabs.f64 x))) (/.f64 (+.f64 (+.f64 (/.f64 1 (fabs.f64 x)) (*.f64 (/.f64 1 2) (*.f64 (*.f64 (/.f64 1 (fabs.f64 x)) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))))) (+.f64 (*.f64 (/.f64 3 4) (*.f64 (*.f64 (*.f64 (*.f64 (/.f64 1 (fabs.f64 x)) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x)))) (*.f64 (*.f64 (/.f64 15 8) (/.f64 1 (fabs.f64 x))) (Rewrite<= *-commutative_binary64 (*.f64 (*.f64 (*.f64 (*.f64 (*.f64 (/.f64 1 (fabs.f64 x)) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))))))) (sqrt.f64 (PI.f64)))): 0 points increase in error, 0 points decrease in error
   (*.f64 (exp.f64 (*.f64 (fabs.f64 x) (fabs.f64 x))) (/.f64 (+.f64 (+.f64 (/.f64 1 (fabs.f64 x)) (*.f64 (/.f64 1 2) (*.f64 (*.f64 (/.f64 1 (fabs.f64 x)) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))))) (+.f64 (*.f64 (/.f64 3 4) (*.f64 (*.f64 (*.f64 (*.f64 (/.f64 1 (fabs.f64 x)) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x)))) (Rewrite<= associate-*r*_binary64 (*.f64 (/.f64 15 8) (*.f64 (/.f64 1 (fabs.f64 x)) (*.f64 (*.f64 (*.f64 (*.f64 (*.f64 (/.f64 1 (fabs.f64 x)) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x)))))))) (sqrt.f64 (PI.f64)))): 3 points increase in error, 3 points decrease in error
   (*.f64 (exp.f64 (*.f64 (fabs.f64 x) (fabs.f64 x))) (/.f64 (+.f64 (+.f64 (/.f64 1 (fabs.f64 x)) (*.f64 (/.f64 1 2) (*.f64 (*.f64 (/.f64 1 (fabs.f64 x)) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))))) (+.f64 (*.f64 (/.f64 3 4) (*.f64 (*.f64 (*.f64 (*.f64 (/.f64 1 (fabs.f64 x)) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x)))) (*.f64 (/.f64 15 8) (Rewrite<= *-commutative_binary64 (*.f64 (*.f64 (*.f64 (*.f64 (*.f64 (*.f64 (/.f64 1 (fabs.f64 x)) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))))))) (sqrt.f64 (PI.f64)))): 0 points increase in error, 0 points decrease in error
   (*.f64 (exp.f64 (*.f64 (fabs.f64 x) (fabs.f64 x))) (/.f64 (Rewrite<= associate-+l+_binary64 (+.f64 (+.f64 (+.f64 (/.f64 1 (fabs.f64 x)) (*.f64 (/.f64 1 2) (*.f64 (*.f64 (/.f64 1 (fabs.f64 x)) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))))) (*.f64 (/.f64 3 4) (*.f64 (*.f64 (*.f64 (*.f64 (/.f64 1 (fabs.f64 x)) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))))) (*.f64 (/.f64 15 8) (*.f64 (*.f64 (*.f64 (*.f64 (*.f64 (*.f64 (/.f64 1 (fabs.f64 x)) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x)))))) (sqrt.f64 (PI.f64)))): 26 points increase in error, 31 points decrease in error
   (*.f64 (exp.f64 (*.f64 (fabs.f64 x) (fabs.f64 x))) (/.f64 (Rewrite<= *-rgt-identity_binary64 (*.f64 (+.f64 (+.f64 (+.f64 (/.f64 1 (fabs.f64 x)) (*.f64 (/.f64 1 2) (*.f64 (*.f64 (/.f64 1 (fabs.f64 x)) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))))) (*.f64 (/.f64 3 4) (*.f64 (*.f64 (*.f64 (*.f64 (/.f64 1 (fabs.f64 x)) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))))) (*.f64 (/.f64 15 8) (*.f64 (*.f64 (*.f64 (*.f64 (*.f64 (*.f64 (/.f64 1 (fabs.f64 x)) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))))) 1)) (sqrt.f64 (PI.f64)))): 0 points increase in error, 0 points decrease in error
   (*.f64 (exp.f64 (*.f64 (fabs.f64 x) (fabs.f64 x))) (Rewrite<= associate-*r/_binary64 (*.f64 (+.f64 (+.f64 (+.f64 (/.f64 1 (fabs.f64 x)) (*.f64 (/.f64 1 2) (*.f64 (*.f64 (/.f64 1 (fabs.f64 x)) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))))) (*.f64 (/.f64 3 4) (*.f64 (*.f64 (*.f64 (*.f64 (/.f64 1 (fabs.f64 x)) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))))) (*.f64 (/.f64 15 8) (*.f64 (*.f64 (*.f64 (*.f64 (*.f64 (*.f64 (/.f64 1 (fabs.f64 x)) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))))) (/.f64 1 (sqrt.f64 (PI.f64)))))): 67 points increase in error, 81 points decrease in error
   (Rewrite<= associate-*l*_binary64 (*.f64 (*.f64 (exp.f64 (*.f64 (fabs.f64 x) (fabs.f64 x))) (+.f64 (+.f64 (+.f64 (/.f64 1 (fabs.f64 x)) (*.f64 (/.f64 1 2) (*.f64 (*.f64 (/.f64 1 (fabs.f64 x)) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))))) (*.f64 (/.f64 3 4) (*.f64 (*.f64 (*.f64 (*.f64 (/.f64 1 (fabs.f64 x)) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))))) (*.f64 (/.f64 15 8) (*.f64 (*.f64 (*.f64 (*.f64 (*.f64 (*.f64 (/.f64 1 (fabs.f64 x)) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x)))))) (/.f64 1 (sqrt.f64 (PI.f64))))): 43 points increase in error, 45 points decrease in error
   (Rewrite<= *-commutative_binary64 (*.f64 (/.f64 1 (sqrt.f64 (PI.f64))) (*.f64 (exp.f64 (*.f64 (fabs.f64 x) (fabs.f64 x))) (+.f64 (+.f64 (+.f64 (/.f64 1 (fabs.f64 x)) (*.f64 (/.f64 1 2) (*.f64 (*.f64 (/.f64 1 (fabs.f64 x)) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))))) (*.f64 (/.f64 3 4) (*.f64 (*.f64 (*.f64 (*.f64 (/.f64 1 (fabs.f64 x)) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))))) (*.f64 (/.f64 15 8) (*.f64 (*.f64 (*.f64 (*.f64 (*.f64 (*.f64 (/.f64 1 (fabs.f64 x)) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x)))))))): 0 points increase in error, 0 points decrease in error
   (Rewrite<= associate-*l*_binary64 (*.f64 (*.f64 (/.f64 1 (sqrt.f64 (PI.f64))) (exp.f64 (*.f64 (fabs.f64 x) (fabs.f64 x)))) (+.f64 (+.f64 (+.f64 (/.f64 1 (fabs.f64 x)) (*.f64 (/.f64 1 2) (*.f64 (*.f64 (/.f64 1 (fabs.f64 x)) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))))) (*.f64 (/.f64 3 4) (*.f64 (*.f64 (*.f64 (*.f64 (/.f64 1 (fabs.f64 x)) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))))) (*.f64 (/.f64 15 8) (*.f64 (*.f64 (*.f64 (*.f64 (*.f64 (*.f64 (/.f64 1 (fabs.f64 x)) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))) (/.f64 1 (fabs.f64 x))))))): 51 points increase in error, 43 points decrease in error

3. Taylor expanded in x around 0 1.2

   \[\leadsto {\left(e^{x}\right)}^{x} \cdot \color{blue}{\left(\left(\frac{1}{\left|x\right|} + 0.75 \cdot \frac{1}{{\left(\left|x\right|\right)}^{5}}\right) \cdot \sqrt{\frac{1}{\pi}} + \frac{0.5 \cdot \frac{1}{\left|x\right|} + 1.875 \cdot \frac{1}{{\left(\left|x\right|\right)}^{5}}}{{x}^{2}} \cdot \sqrt{\frac{1}{\pi}}\right)} \]

4. Simplified 1.2

   \[\leadsto {\left(e^{x}\right)}^{x} \cdot \color{blue}{\left(\sqrt{\frac{1}{\pi}} \cdot \left(\frac{\frac{0.5}{x} + \frac{1.875}{{x}^{5}}}{x \cdot x} + \left(\frac{1}{x} + \frac{0.75}{{x}^{5}}\right)\right)\right)} \]
   Proof
   (*.f64 (sqrt.f64 (/.f64 1 (PI.f64))) (+.f64 (/.f64 (+.f64 (/.f64 1/2 x) (/.f64 15/8 (pow.f64 x 5))) (*.f64 x x)) (+.f64 (/.f64 1 x) (/.f64 3/4 (pow.f64 x 5))))): 0 points increase in error, 0 points decrease in error
   (*.f64 (sqrt.f64 (/.f64 1 (PI.f64))) (+.f64 (/.f64 (+.f64 (/.f64 (Rewrite<= metadata-eval (*.f64 1/2 1)) x) (/.f64 15/8 (pow.f64 x 5))) (*.f64 x x)) (+.f64 (/.f64 1 x) (/.f64 3/4 (pow.f64 x 5))))): 0 points increase in error, 0 points decrease in error
   (*.f64 (sqrt.f64 (/.f64 1 (PI.f64))) (+.f64 (/.f64 (+.f64 (/.f64 (*.f64 1/2 1) (Rewrite<= unpow1_binary64 (pow.f64 x 1))) (/.f64 15/8 (pow.f64 x 5))) (*.f64 x x)) (+.f64 (/.f64 1 x) (/.f64 3/4 (pow.f64 x 5))))): 0 points increase in error, 0 points decrease in error
   (*.f64 (sqrt.f64 (/.f64 1 (PI.f64))) (+.f64 (/.f64 (+.f64 (/.f64 (*.f64 1/2 1) (Rewrite=> sqr-pow_binary64 (*.f64 (pow.f64 x (/.f64 1 2)) (pow.f64 x (/.f64 1 2))))) (/.f64 15/8 (pow.f64 x 5))) (*.f64 x x)) (+.f64 (/.f64 1 x) (/.f64 3/4 (pow.f64 x 5))))): 1 points increase in error, 3 points decrease in error
   (*.f64 (sqrt.f64 (/.f64 1 (PI.f64))) (+.f64 (/.f64 (+.f64 (/.f64 (*.f64 1/2 1) (Rewrite<= fabs-sqr_binary64 (fabs.f64 (*.f64 (pow.f64 x (/.f64 1 2)) (pow.f64 x (/.f64 1 2)))))) (/.f64 15/8 (pow.f64 x 5))) (*.f64 x x)) (+.f64 (/.f64 1 x) (/.f64 3/4 (pow.f64 x 5))))): 0 points increase in error, 0 points decrease in error
   (*.f64 (sqrt.f64 (/.f64 1 (PI.f64))) (+.f64 (/.f64 (+.f64 (/.f64 (*.f64 1/2 1) (fabs.f64 (Rewrite<= sqr-pow_binary64 (pow.f64 x 1)))) (/.f64 15/8 (pow.f64 x 5))) (*.f64 x x)) (+.f64 (/.f64 1 x) (/.f64 3/4 (pow.f64 x 5))))): 3 points increase in error, 1 points decrease in error
   (*.f64 (sqrt.f64 (/.f64 1 (PI.f64))) (+.f64 (/.f64 (+.f64 (/.f64 (*.f64 1/2 1) (fabs.f64 (Rewrite=> unpow1_binary64 x))) (/.f64 15/8 (pow.f64 x 5))) (*.f64 x x)) (+.f64 (/.f64 1 x) (/.f64 3/4 (pow.f64 x 5))))): 0 points increase in error, 0 points decrease in error
   (*.f64 (sqrt.f64 (/.f64 1 (PI.f64))) (+.f64 (/.f64 (+.f64 (Rewrite<= associate-*r/_binary64 (*.f64 1/2 (/.f64 1 (fabs.f64 x)))) (/.f64 15/8 (pow.f64 x 5))) (*.f64 x x)) (+.f64 (/.f64 1 x) (/.f64 3/4 (pow.f64 x 5))))): 0 points increase in error, 0 points decrease in error
   (*.f64 (sqrt.f64 (/.f64 1 (PI.f64))) (+.f64 (/.f64 (+.f64 (*.f64 1/2 (/.f64 1 (fabs.f64 x))) (/.f64 (Rewrite<= metadata-eval (*.f64 15/8 1)) (pow.f64 x 5))) (*.f64 x x)) (+.f64 (/.f64 1 x) (/.f64 3/4 (pow.f64 x 5))))): 0 points increase in error, 0 points decrease in error
   (*.f64 (sqrt.f64 (/.f64 1 (PI.f64))) (+.f64 (/.f64 (+.f64 (*.f64 1/2 (/.f64 1 (fabs.f64 x))) (/.f64 (*.f64 15/8 1) (pow.f64 (Rewrite<= unpow1_binary64 (pow.f64 x 1)) 5))) (*.f64 x x)) (+.f64 (/.f64 1 x) (/.f64 3/4 (pow.f64 x 5))))): 0 points increase in error, 0 points decrease in error
   (*.f64 (sqrt.f64 (/.f64 1 (PI.f64))) (+.f64 (/.f64 (+.f64 (*.f64 1/2 (/.f64 1 (fabs.f64 x))) (/.f64 (*.f64 15/8 1) (pow.f64 (Rewrite=> sqr-pow_binary64 (*.f64 (pow.f64 x (/.f64 1 2)) (pow.f64 x (/.f64 1 2)))) 5))) (*.f64 x x)) (+.f64 (/.f64 1 x) (/.f64 3/4 (pow.f64 x 5))))): 11 points increase in error, 21 points decrease in error
   (*.f64 (sqrt.f64 (/.f64 1 (PI.f64))) (+.f64 (/.f64 (+.f64 (*.f64 1/2 (/.f64 1 (fabs.f64 x))) (/.f64 (*.f64 15/8 1) (pow.f64 (Rewrite<= fabs-sqr_binary64 (fabs.f64 (*.f64 (pow.f64 x (/.f64 1 2)) (pow.f64 x (/.f64 1 2))))) 5))) (*.f64 x x)) (+.f64 (/.f64 1 x) (/.f64 3/4 (pow.f64 x 5))))): 0 points increase in error, 0 points decrease in error
   (*.f64 (sqrt.f64 (/.f64 1 (PI.f64))) (+.f64 (/.f64 (+.f64 (*.f64 1/2 (/.f64 1 (fabs.f64 x))) (/.f64 (*.f64 15/8 1) (pow.f64 (fabs.f64 (Rewrite<= sqr-pow_binary64 (pow.f64 x 1))) 5))) (*.f64 x x)) (+.f64 (/.f64 1 x) (/.f64 3/4 (pow.f64 x 5))))): 21 points increase in error, 11 points decrease in error
   (*.f64 (sqrt.f64 (/.f64 1 (PI.f64))) (+.f64 (/.f64 (+.f64 (*.f64 1/2 (/.f64 1 (fabs.f64 x))) (/.f64 (*.f64 15/8 1) (pow.f64 (fabs.f64 (Rewrite=> unpow1_binary64 x)) 5))) (*.f64 x x)) (+.f64 (/.f64 1 x) (/.f64 3/4 (pow.f64 x 5))))): 0 points increase in error, 0 points decrease in error
   (*.f64 (sqrt.f64 (/.f64 1 (PI.f64))) (+.f64 (/.f64 (+.f64 (*.f64 1/2 (/.f64 1 (fabs.f64 x))) (Rewrite<= associate-*r/_binary64 (*.f64 15/8 (/.f64 1 (pow.f64 (fabs.f64 x) 5))))) (*.f64 x x)) (+.f64 (/.f64 1 x) (/.f64 3/4 (pow.f64 x 5))))): 1 points increase in error, 5 points decrease in error
   (*.f64 (sqrt.f64 (/.f64 1 (PI.f64))) (+.f64 (/.f64 (+.f64 (*.f64 1/2 (/.f64 1 (fabs.f64 x))) (*.f64 15/8 (/.f64 1 (pow.f64 (fabs.f64 x) 5)))) (Rewrite<= unpow2_binary64 (pow.f64 x 2))) (+.f64 (/.f64 1 x) (/.f64 3/4 (pow.f64 x 5))))): 0 points increase in error, 0 points decrease in error
   (*.f64 (sqrt.f64 (/.f64 1 (PI.f64))) (+.f64 (/.f64 (+.f64 (*.f64 1/2 (/.f64 1 (fabs.f64 x))) (*.f64 15/8 (/.f64 1 (pow.f64 (fabs.f64 x) 5)))) (pow.f64 x 2)) (+.f64 (/.f64 1 (Rewrite<= unpow1_binary64 (pow.f64 x 1))) (/.f64 3/4 (pow.f64 x 5))))): 0 points increase in error, 0 points decrease in error
   (*.f64 (sqrt.f64 (/.f64 1 (PI.f64))) (+.f64 (/.f64 (+.f64 (*.f64 1/2 (/.f64 1 (fabs.f64 x))) (*.f64 15/8 (/.f64 1 (pow.f64 (fabs.f64 x) 5)))) (pow.f64 x 2)) (+.f64 (/.f64 1 (Rewrite=> sqr-pow_binary64 (*.f64 (pow.f64 x (/.f64 1 2)) (pow.f64 x (/.f64 1 2))))) (/.f64 3/4 (pow.f64 x 5))))): 40 points increase in error, 49 points decrease in error
   (*.f64 (sqrt.f64 (/.f64 1 (PI.f64))) (+.f64 (/.f64 (+.f64 (*.f64 1/2 (/.f64 1 (fabs.f64 x))) (*.f64 15/8 (/.f64 1 (pow.f64 (fabs.f64 x) 5)))) (pow.f64 x 2)) (+.f64 (/.f64 1 (Rewrite<= fabs-sqr_binary64 (fabs.f64 (*.f64 (pow.f64 x (/.f64 1 2)) (pow.f64 x (/.f64 1 2)))))) (/.f64 3/4 (pow.f64 x 5))))): 0 points increase in error, 0 points decrease in error
   (*.f64 (sqrt.f64 (/.f64 1 (PI.f64))) (+.f64 (/.f64 (+.f64 (*.f64 1/2 (/.f64 1 (fabs.f64 x))) (*.f64 15/8 (/.f64 1 (pow.f64 (fabs.f64 x) 5)))) (pow.f64 x 2)) (+.f64 (/.f64 1 (fabs.f64 (Rewrite<= sqr-pow_binary64 (pow.f64 x 1)))) (/.f64 3/4 (pow.f64 x 5))))): 49 points increase in error, 40 points decrease in error
   (*.f64 (sqrt.f64 (/.f64 1 (PI.f64))) (+.f64 (/.f64 (+.f64 (*.f64 1/2 (/.f64 1 (fabs.f64 x))) (*.f64 15/8 (/.f64 1 (pow.f64 (fabs.f64 x) 5)))) (pow.f64 x 2)) (+.f64 (/.f64 1 (fabs.f64 (Rewrite=> unpow1_binary64 x))) (/.f64 3/4 (pow.f64 x 5))))): 0 points increase in error, 0 points decrease in error
   (*.f64 (sqrt.f64 (/.f64 1 (PI.f64))) (+.f64 (/.f64 (+.f64 (*.f64 1/2 (/.f64 1 (fabs.f64 x))) (*.f64 15/8 (/.f64 1 (pow.f64 (fabs.f64 x) 5)))) (pow.f64 x 2)) (+.f64 (/.f64 1 (fabs.f64 x)) (/.f64 (Rewrite<= metadata-eval (*.f64 3/4 1)) (pow.f64 x 5))))): 0 points increase in error, 0 points decrease in error
   (*.f64 (sqrt.f64 (/.f64 1 (PI.f64))) (+.f64 (/.f64 (+.f64 (*.f64 1/2 (/.f64 1 (fabs.f64 x))) (*.f64 15/8 (/.f64 1 (pow.f64 (fabs.f64 x) 5)))) (pow.f64 x 2)) (+.f64 (/.f64 1 (fabs.f64 x)) (/.f64 (*.f64 3/4 1) (pow.f64 (Rewrite<= unpow1_binary64 (pow.f64 x 1)) 5))))): 0 points increase in error, 0 points decrease in error
   (*.f64 (sqrt.f64 (/.f64 1 (PI.f64))) (+.f64 (/.f64 (+.f64 (*.f64 1/2 (/.f64 1 (fabs.f64 x))) (*.f64 15/8 (/.f64 1 (pow.f64 (fabs.f64 x) 5)))) (pow.f64 x 2)) (+.f64 (/.f64 1 (fabs.f64 x)) (/.f64 (*.f64 3/4 1) (pow.f64 (Rewrite=> sqr-pow_binary64 (*.f64 (pow.f64 x (/.f64 1 2)) (pow.f64 x (/.f64 1 2)))) 5))))): 6 points increase in error, 17 points decrease in error
   (*.f64 (sqrt.f64 (/.f64 1 (PI.f64))) (+.f64 (/.f64 (+.f64 (*.f64 1/2 (/.f64 1 (fabs.f64 x))) (*.f64 15/8 (/.f64 1 (pow.f64 (fabs.f64 x) 5)))) (pow.f64 x 2)) (+.f64 (/.f64 1 (fabs.f64 x)) (/.f64 (*.f64 3/4 1) (pow.f64 (Rewrite<= fabs-sqr_binary64 (fabs.f64 (*.f64 (pow.f64 x (/.f64 1 2)) (pow.f64 x (/.f64 1 2))))) 5))))): 0 points increase in error, 0 points decrease in error
   (*.f64 (sqrt.f64 (/.f64 1 (PI.f64))) (+.f64 (/.f64 (+.f64 (*.f64 1/2 (/.f64 1 (fabs.f64 x))) (*.f64 15/8 (/.f64 1 (pow.f64 (fabs.f64 x) 5)))) (pow.f64 x 2)) (+.f64 (/.f64 1 (fabs.f64 x)) (/.f64 (*.f64 3/4 1) (pow.f64 (fabs.f64 (Rewrite<= sqr-pow_binary64 (pow.f64 x 1))) 5))))): 17 points increase in error, 6 points decrease in error
   (*.f64 (sqrt.f64 (/.f64 1 (PI.f64))) (+.f64 (/.f64 (+.f64 (*.f64 1/2 (/.f64 1 (fabs.f64 x))) (*.f64 15/8 (/.f64 1 (pow.f64 (fabs.f64 x) 5)))) (pow.f64 x 2)) (+.f64 (/.f64 1 (fabs.f64 x)) (/.f64 (*.f64 3/4 1) (pow.f64 (fabs.f64 (Rewrite=> unpow1_binary64 x)) 5))))): 0 points increase in error, 0 points decrease in error
   (*.f64 (sqrt.f64 (/.f64 1 (PI.f64))) (+.f64 (/.f64 (+.f64 (*.f64 1/2 (/.f64 1 (fabs.f64 x))) (*.f64 15/8 (/.f64 1 (pow.f64 (fabs.f64 x) 5)))) (pow.f64 x 2)) (+.f64 (/.f64 1 (fabs.f64 x)) (Rewrite<= associate-*r/_binary64 (*.f64 3/4 (/.f64 1 (pow.f64 (fabs.f64 x) 5))))))): 2 points increase in error, 1 points decrease in error
   (Rewrite<= distribute-rgt-out_binary64 (+.f64 (*.f64 (/.f64 (+.f64 (*.f64 1/2 (/.f64 1 (fabs.f64 x))) (*.f64 15/8 (/.f64 1 (pow.f64 (fabs.f64 x) 5)))) (pow.f64 x 2)) (sqrt.f64 (/.f64 1 (PI.f64)))) (*.f64 (+.f64 (/.f64 1 (fabs.f64 x)) (*.f64 3/4 (/.f64 1 (pow.f64 (fabs.f64 x) 5)))) (sqrt.f64 (/.f64 1 (PI.f64)))))): 47 points increase in error, 38 points decrease in error
   (Rewrite<= +-commutative_binary64 (+.f64 (*.f64 (+.f64 (/.f64 1 (fabs.f64 x)) (*.f64 3/4 (/.f64 1 (pow.f64 (fabs.f64 x) 5)))) (sqrt.f64 (/.f64 1 (PI.f64)))) (*.f64 (/.f64 (+.f64 (*.f64 1/2 (/.f64 1 (fabs.f64 x))) (*.f64 15/8 (/.f64 1 (pow.f64 (fabs.f64 x) 5)))) (pow.f64 x 2)) (sqrt.f64 (/.f64 1 (PI.f64)))))): 0 points increase in error, 0 points decrease in error

5. Taylor expanded in x around 0 1.2

   \[\leadsto {\left(e^{x}\right)}^{x} \cdot \left(\sqrt{\frac{1}{\pi}} \cdot \left(\color{blue}{\left(0.5 \cdot \frac{1}{{x}^{3}} + 1.875 \cdot \frac{1}{{x}^{7}}\right)} + \left(\frac{1}{x} + \frac{0.75}{{x}^{5}}\right)\right)\right) \]

6. Simplified 1.2

   \[\leadsto {\left(e^{x}\right)}^{x} \cdot \left(\sqrt{\frac{1}{\pi}} \cdot \left(\color{blue}{\left(\frac{0.5}{{x}^{3}} + \frac{1.875}{{x}^{7}}\right)} + \left(\frac{1}{x} + \frac{0.75}{{x}^{5}}\right)\right)\right) \]
   Proof
   (+.f64 (/.f64 1/2 (pow.f64 x 3)) (/.f64 15/8 (pow.f64 x 7))): 0 points increase in error, 0 points decrease in error
   (+.f64 (/.f64 (Rewrite<= metadata-eval (*.f64 1/2 1)) (pow.f64 x 3)) (/.f64 15/8 (pow.f64 x 7))): 0 points increase in error, 0 points decrease in error
   (+.f64 (Rewrite<= associate-*r/_binary64 (*.f64 1/2 (/.f64 1 (pow.f64 x 3)))) (/.f64 15/8 (pow.f64 x 7))): 0 points increase in error, 0 points decrease in error
   (+.f64 (*.f64 1/2 (/.f64 1 (pow.f64 x 3))) (/.f64 (Rewrite<= metadata-eval (*.f64 15/8 1)) (pow.f64 x 7))): 0 points increase in error, 0 points decrease in error
   (+.f64 (*.f64 1/2 (/.f64 1 (pow.f64 x 3))) (Rewrite<= associate-*r/_binary64 (*.f64 15/8 (/.f64 1 (pow.f64 x 7))))): 8 points increase in error, 4 points decrease in error

7. Final simplification 1.2

   \[\leadsto {\left(e^{x}\right)}^{x} \cdot \left(\sqrt{\frac{1}{\pi}} \cdot \left(\left(\frac{0.5}{{x}^{3}} + \frac{1.875}{{x}^{7}}\right) + \left(\frac{1}{x} + \frac{0.75}{{x}^{5}}\right)\right)\right) \]

Alternatives

Alternative 1
Error	1.2
Cost	40128

\[{\left(e^{x}\right)}^{x} \cdot \left(\sqrt{\frac{1}{\pi}} \cdot \left(\left(\frac{1}{x} + \frac{0.75}{{x}^{5}}\right) + \frac{\frac{0.5}{x} + \frac{1.875}{{x}^{5}}}{x \cdot x}\right)\right) \]

Alternative 2
Error	1.3
Cost	33664

\[\left({\left(e^{x}\right)}^{x} \cdot \frac{1}{x \cdot \sqrt{\pi}}\right) \cdot \left(1 + \left(\frac{1.875}{{x}^{6}} + \frac{0.5 + \frac{0.75}{x \cdot x}}{x \cdot x}\right)\right) \]

Alternative 3
Error	1.2
Cost	33600

\[\left(1 + \left(\frac{1.875}{{x}^{6}} + \frac{0.5 + \frac{0.75}{x \cdot x}}{x \cdot x}\right)\right) \cdot \left({\pi}^{-0.5} \cdot \frac{{\left(e^{x}\right)}^{x}}{x}\right) \]

Alternative 4
Error	1.3
Cost	33536

\[\left(1 + \left(\frac{1.875}{{x}^{6}} + \frac{0.5 + \frac{0.75}{x \cdot x}}{x \cdot x}\right)\right) \cdot \frac{{\left(e^{x}\right)}^{x}}{x \cdot \sqrt{\pi}} \]

Alternative 5
Error	43.7
Cost	33216

\[\frac{\frac{e^{x \cdot x}}{\left|x\right|}}{\sqrt{\pi}} \cdot \left(1 + \left(\frac{1.875}{{x}^{6}} + \frac{0.5}{x \cdot x}\right)\right) \]

Alternative 6
Error	48.0
Cost	32896

\[\left(\frac{1}{x} + \frac{0.75}{{x}^{5}}\right) \cdot \left({\left(e^{x}\right)}^{x} \cdot \sqrt{\frac{1}{\pi}}\right) \]

Alternative 7
Error	44.7
Cost	32896

\[{\left(e^{x}\right)}^{x} \cdot \left(\sqrt{\frac{1}{\pi}} \cdot \left(\frac{0.5}{{x}^{3}} + \frac{1}{x}\right)\right) \]

Alternative 8
Error	48.3
Cost	32384

\[e^{\mathsf{fma}\left(x, x, -0.5 \cdot \log \pi\right) - \log x} \]

Alternative 9
Error	48.3
Cost	26112

\[\frac{1}{\frac{x}{e^{\mathsf{fma}\left(x, x, -0.5 \cdot \log \pi\right)}}} \]

Alternative 10
Error	48.3
Cost	19584

\[\frac{e^{x \cdot x}}{x \cdot \sqrt{\pi}} \]

Alternative 11
Error	56.5
Cost	13568

\[\sqrt{\frac{1}{\pi}} \cdot \left(\frac{1}{x} + \frac{x}{\frac{x}{x}}\right) \]

Alternative 12
Error	56.8
Cost	12992

\[\frac{{\pi}^{-0.5}}{x} \]

Reproduce

herbie shell --seed 2022325 
(FPCore (x)
  :name "Jmat.Real.erfi, branch x greater than or equal to 5"
  :precision binary64
  :pre (>= x 0.5)
  (* (* (/ 1.0 (sqrt PI)) (exp (* (fabs x) (fabs x)))) (+ (+ (+ (/ 1.0 (fabs x)) (* (/ 1.0 2.0) (* (* (/ 1.0 (fabs x)) (/ 1.0 (fabs x))) (/ 1.0 (fabs x))))) (* (/ 3.0 4.0) (* (* (* (* (/ 1.0 (fabs x)) (/ 1.0 (fabs x))) (/ 1.0 (fabs x))) (/ 1.0 (fabs x))) (/ 1.0 (fabs x))))) (* (/ 15.0 8.0) (* (* (* (* (* (* (/ 1.0 (fabs x)) (/ 1.0 (fabs x))) (/ 1.0 (fabs x))) (/ 1.0 (fabs x))) (/ 1.0 (fabs x))) (/ 1.0 (fabs x))) (/ 1.0 (fabs x)))))))