Rosa's FloatVsDoubleBenchmark

Average Error: 0.5 → 0.5

Time: 45.4s

Precision: binary64

Cost: 6720

Math

\[x1 + \left(\left(\left(\left(\left(\left(\left(2 \cdot x1\right) \cdot \frac{\left(\left(3 \cdot x1\right) \cdot x1 + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1}\right) \cdot \left(\frac{\left(\left(3 \cdot x1\right) \cdot x1 + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} - 3\right) + \left(x1 \cdot x1\right) \cdot \left(4 \cdot \frac{\left(\left(3 \cdot x1\right) \cdot x1 + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} - 6\right)\right) \cdot \left(x1 \cdot x1 + 1\right) + \left(\left(3 \cdot x1\right) \cdot x1\right) \cdot \frac{\left(\left(3 \cdot x1\right) \cdot x1 + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1}\right) + \left(x1 \cdot x1\right) \cdot x1\right) + x1\right) + 3 \cdot \frac{\left(\left(3 \cdot x1\right) \cdot x1 - 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1}\right)\]

↓

\[x1 + \left(3 \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) - 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} + x1 \cdot \left(x1 \cdot \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1}\right)\right) + \left(x1 \cdot x1 + 1\right) \cdot \left(x1 + \left(\left(x1 \cdot x1\right) \cdot -6 + \left(\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1\right) \cdot \frac{\left(x1 + x1\right) \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} - 3\right) + \left(x1 \cdot x1\right) \cdot 4}{x1 \cdot x1 + 1}\right)\right)\right)\]

FPCore

(FPCore (x1 x2)
 :precision binary64
 (+
  x1
  (+
   (+
    (+
     (+
      (*
       (+
        (*
         (*
          (* 2.0 x1)
          (/ (- (+ (* (* 3.0 x1) x1) (* 2.0 x2)) x1) (+ (* x1 x1) 1.0)))
         (- (/ (- (+ (* (* 3.0 x1) x1) (* 2.0 x2)) x1) (+ (* x1 x1) 1.0)) 3.0))
        (*
         (* x1 x1)
         (-
          (* 4.0 (/ (- (+ (* (* 3.0 x1) x1) (* 2.0 x2)) x1) (+ (* x1 x1) 1.0)))
          6.0)))
       (+ (* x1 x1) 1.0))
      (*
       (* (* 3.0 x1) x1)
       (/ (- (+ (* (* 3.0 x1) x1) (* 2.0 x2)) x1) (+ (* x1 x1) 1.0))))
     (* (* x1 x1) x1))
    x1)
   (* 3.0 (/ (- (- (* (* 3.0 x1) x1) (* 2.0 x2)) x1) (+ (* x1 x1) 1.0))))))

↓

(FPCore (x1 x2)
 :precision binary64
 (+
  x1
  (+
   (*
    3.0
    (+
     (/ (- (- (* x1 (* x1 3.0)) (* 2.0 x2)) x1) (+ (* x1 x1) 1.0))
     (*
      x1
      (* x1 (/ (- (+ (* x1 (* x1 3.0)) (* 2.0 x2)) x1) (+ (* x1 x1) 1.0))))))
   (*
    (+ (* x1 x1) 1.0)
    (+
     x1
     (+
      (* (* x1 x1) -6.0)
      (*
       (- (+ (* x1 (* x1 3.0)) (* 2.0 x2)) x1)
       (/
        (+
         (*
          (+ x1 x1)
          (-
           (/ (- (+ (* x1 (* x1 3.0)) (* 2.0 x2)) x1) (+ (* x1 x1) 1.0))
           3.0))
         (* (* x1 x1) 4.0))
        (+ (* x1 x1) 1.0)))))))))

C

double code(double x1, double x2) {
	return x1 + (((((((((2.0 * x1) * (((((3.0 * x1) * x1) + (2.0 * x2)) - x1) / ((x1 * x1) + 1.0))) * ((((((3.0 * x1) * x1) + (2.0 * x2)) - x1) / ((x1 * x1) + 1.0)) - 3.0)) + ((x1 * x1) * ((4.0 * (((((3.0 * x1) * x1) + (2.0 * x2)) - x1) / ((x1 * x1) + 1.0))) - 6.0))) * ((x1 * x1) + 1.0)) + (((3.0 * x1) * x1) * (((((3.0 * x1) * x1) + (2.0 * x2)) - x1) / ((x1 * x1) + 1.0)))) + ((x1 * x1) * x1)) + x1) + (3.0 * (((((3.0 * x1) * x1) - (2.0 * x2)) - x1) / ((x1 * x1) + 1.0))));
}

↓

double code(double x1, double x2) {
	return x1 + ((3.0 * (((((x1 * (x1 * 3.0)) - (2.0 * x2)) - x1) / ((x1 * x1) + 1.0)) + (x1 * (x1 * ((((x1 * (x1 * 3.0)) + (2.0 * x2)) - x1) / ((x1 * x1) + 1.0)))))) + (((x1 * x1) + 1.0) * (x1 + (((x1 * x1) * -6.0) + ((((x1 * (x1 * 3.0)) + (2.0 * x2)) - x1) * ((((x1 + x1) * (((((x1 * (x1 * 3.0)) + (2.0 * x2)) - x1) / ((x1 * x1) + 1.0)) - 3.0)) + ((x1 * x1) * 4.0)) / ((x1 * x1) + 1.0)))))));
}

Error

Bits error versus x1

Bits error versus x2

Alternatives

Alternative 1
Error	17.3
Cost	61120

\[x1 + \left(3 \cdot \frac{\left(x1 \cdot \left(x1 \cdot 3\right) - 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} + \left(x1 + \left(x1 \cdot \left(x1 \cdot x1\right) + \left(\left(x1 \cdot \left(x1 \cdot 3\right)\right) \cdot \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} + \left(x1 \cdot x1 + 1\right) \cdot \frac{\left(\left(\left(\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1\right) \cdot \left(x1 \cdot 2\right)\right) \cdot \left({\left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1}\right)}^{3} - 27\right)\right) \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{\frac{{\left(x1 \cdot x1 + 1\right)}^{2}}{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}} \cdot 16 + \left(36 + 6 \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} \cdot 4\right)\right)\right) + \left(\left(x1 \cdot x1 + 1\right) \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{\frac{{\left(x1 \cdot x1 + 1\right)}^{2}}{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}} + \left(9 + 3 \cdot \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1}\right)\right)\right) \cdot \left(\left(x1 \cdot x1\right) \cdot \left({\left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} \cdot 4\right)}^{3} - 216\right)\right)}{\left(\left(x1 \cdot x1 + 1\right) \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{\frac{{\left(x1 \cdot x1 + 1\right)}^{2}}{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}} + \left(9 + 3 \cdot \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1}\right)\right)\right) \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{\frac{{\left(x1 \cdot x1 + 1\right)}^{2}}{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}} \cdot 16 + \left(36 + 6 \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} \cdot 4\right)\right)\right)}\right)\right)\right)\right)\]

Alternative 2
Error	16.1
Cost	44608

\[x1 + \left(\left(x1 + \left(\left(\left(x1 \cdot x1 + 1\right) \cdot \frac{\left(\left(\left(\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1\right) \cdot \left(x1 \cdot 2\right)\right) \cdot \left({\left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1}\right)}^{3} - 27\right)\right) \cdot \left(6 + \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} \cdot 4\right) + \left(\left(x1 \cdot x1\right) \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{\frac{{\left(x1 \cdot x1 + 1\right)}^{2}}{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}} \cdot 16 + -36\right)\right) \cdot \left(\left(x1 \cdot x1 + 1\right) \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{\frac{{\left(x1 \cdot x1 + 1\right)}^{2}}{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}} + \left(9 + 3 \cdot \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1}\right)\right)\right)}{\left(6 + \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} \cdot 4\right) \cdot \left(\left(x1 \cdot x1 + 1\right) \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{\frac{{\left(x1 \cdot x1 + 1\right)}^{2}}{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}} + \left(9 + 3 \cdot \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1}\right)\right)\right)} + \left(x1 \cdot \left(x1 \cdot 3\right)\right) \cdot \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1}\right) + x1 \cdot \left(x1 \cdot x1\right)\right)\right) + 3 \cdot \frac{\left(x1 \cdot \left(x1 \cdot 3\right) - 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1}\right)\]

Alternative 3
Error	15.6
Cost	44224

\[x1 + \left(3 \cdot \frac{\left(x1 \cdot \left(x1 \cdot 3\right) - 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} + \left(x1 + \left(x1 \cdot \left(x1 \cdot x1\right) + \left(\left(x1 \cdot \left(x1 \cdot 3\right)\right) \cdot \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} + \left(x1 \cdot x1 + 1\right) \cdot \frac{\left(6 + \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} \cdot 4\right) \cdot \left(\left({\left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1}\right)}^{3} - 27\right) \cdot \left(2 \cdot \left(x1 \cdot \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1}\right)\right)\right) + \left(\left(x1 \cdot x1\right) \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{\frac{{\left(x1 \cdot x1 + 1\right)}^{2}}{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}} \cdot 16 + -36\right)\right) \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{\frac{{\left(x1 \cdot x1 + 1\right)}^{2}}{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}} + \left(9 + 3 \cdot \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1}\right)\right)}{\left(6 + \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} \cdot 4\right) \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{\frac{{\left(x1 \cdot x1 + 1\right)}^{2}}{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}} + \left(9 + 3 \cdot \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1}\right)\right)}\right)\right)\right)\right)\]

Alternative 4
Error	15.6
Cost	43712

\[x1 + \left(3 \cdot \frac{\left(x1 \cdot \left(x1 \cdot 3\right) - 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} + \left(x1 + \left(x1 \cdot \left(x1 \cdot x1\right) + \left(\left(x1 \cdot \left(x1 \cdot 3\right)\right) \cdot \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} + \left(x1 \cdot x1 + 1\right) \cdot \frac{\left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{\frac{{\left(x1 \cdot x1 + 1\right)}^{2}}{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}} \cdot 16 + \left(36 + 6 \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} \cdot 4\right)\right)\right) \cdot \left(\left(x1 \cdot 2\right) \cdot \left({\left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1}\right)}^{3} + \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} \cdot -9\right)\right) + \left(\left(x1 \cdot x1\right) \cdot \left({\left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} \cdot 4\right)}^{3} - 216\right)\right) \cdot \left(3 + \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1}\right)}{\left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{\frac{{\left(x1 \cdot x1 + 1\right)}^{2}}{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}} \cdot 16 + \left(36 + 6 \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} \cdot 4\right)\right)\right) \cdot \left(3 + \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1}\right)}\right)\right)\right)\right)\]

Alternative 5
Error	38.2
Cost	41920

\[x1 + \left(3 \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) - 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} + x1 \cdot \left(x1 \cdot \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1}\right)\right) + \left(x1 \cdot x1 + 1\right) \cdot \left(x1 + \frac{{\left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} \cdot \left(\left(x1 + x1\right) \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} - 3\right) + \left(x1 \cdot x1\right) \cdot 4\right)\right)}^{3} + {x1}^{6} \cdot -216}{\left(\left(x1 + x1\right) \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} - 3\right) + \left(x1 \cdot x1\right) \cdot 4\right) \cdot \left(\left(\left(x1 + x1\right) \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} - 3\right) + \left(x1 \cdot x1\right) \cdot 4\right) \cdot \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{\frac{{\left(x1 \cdot x1 + 1\right)}^{2}}{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}}\right) + \left(36 \cdot {x1}^{4} + \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} \cdot \left(\left(x1 + x1\right) \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} - 3\right) + \left(x1 \cdot x1\right) \cdot 4\right)\right) \cdot \left(\left(x1 \cdot x1\right) \cdot 6\right)\right)}\right)\right)\]

Alternative 6
Error	36.8
Cost	37184

\[x1 + \left(3 \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) - 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} + x1 \cdot \left(x1 \cdot \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1}\right)\right) + \left(x1 \cdot x1 + 1\right) \cdot \left(x1 + \left(\left(x1 \cdot x1\right) \cdot -6 + \frac{\left(\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1\right) \cdot \left({\left(\left(x1 + x1\right) \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} - 3\right)\right)}^{3} + {x1}^{6} \cdot 64\right)}{\left(x1 \cdot x1 + 1\right) \cdot \left(\left(\left(x1 \cdot x1\right) \cdot 4\right) \cdot \left(\left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} - 3\right) \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} - 3\right)\right) + \left(16 \cdot {x1}^{4} - \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} - 3\right) \cdot \left(8 \cdot {x1}^{3}\right)\right)\right)}\right)\right)\right)\]

Alternative 7
Error	38.2
Cost	35840

\[x1 + \left(3 \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) - 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} + x1 \cdot \left(x1 \cdot \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1}\right)\right) + \left(x1 \cdot x1 + 1\right) \cdot \left(x1 + \frac{{\left(\left(\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1\right) \cdot \frac{\left(x1 + x1\right) \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} - 3\right) + \left(x1 \cdot x1\right) \cdot 4}{x1 \cdot x1 + 1}\right)}^{3} + {x1}^{6} \cdot -216}{\left(\left(\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1\right) \cdot \frac{\left(x1 + x1\right) \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} - 3\right) + \left(x1 \cdot x1\right) \cdot 4}{x1 \cdot x1 + 1}\right) \cdot \left(\left(\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1\right) \cdot \frac{\left(x1 + x1\right) \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} - 3\right) + \left(x1 \cdot x1\right) \cdot 4}{x1 \cdot x1 + 1}\right) + \left(36 \cdot {x1}^{4} + \left(\left(x1 \cdot x1\right) \cdot 6\right) \cdot \left(\left(\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1\right) \cdot \frac{\left(x1 + x1\right) \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} - 3\right) + \left(x1 \cdot x1\right) \cdot 4}{x1 \cdot x1 + 1}\right)\right)}\right)\right)\]

Alternative 8
Error	37.4
Cost	35392

\[x1 + \left(3 \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) - 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} + x1 \cdot \left(x1 \cdot \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1}\right)\right) + \left(x1 \cdot x1 + 1\right) \cdot \left(x1 + \left(\left(x1 \cdot x1\right) \cdot -6 + \left(\sqrt{\left(x1 + x1\right) \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} - 3\right) + \left(x1 \cdot x1\right) \cdot 4} \cdot \sqrt{\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1}}\right) \cdot \left(\sqrt{\left(x1 + x1\right) \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} - 3\right) + \left(x1 \cdot x1\right) \cdot 4} \cdot \sqrt{\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1}}\right)\right)\right)\right)\]

Alternative 9
Error	0.8
Cost	32832

\[x1 + \left(3 \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) - 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} + x1 \cdot \left(x1 \cdot \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1}\right)\right) + \left(x1 \cdot x1 + 1\right) \cdot \left(x1 + \sqrt[3]{\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} \cdot \left(\left(x1 + x1\right) \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} - 3\right) + \left(x1 \cdot x1\right) \cdot 4\right) + \left(x1 \cdot x1\right) \cdot -6} \cdot \left(\sqrt[3]{\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} \cdot \left(\left(x1 + x1\right) \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} - 3\right) + \left(x1 \cdot x1\right) \cdot 4\right) + \left(x1 \cdot x1\right) \cdot -6} \cdot \sqrt[3]{\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} \cdot \left(\left(x1 + x1\right) \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} - 3\right) + \left(x1 \cdot x1\right) \cdot 4\right) + \left(x1 \cdot x1\right) \cdot -6}\right)\right)\right)\]

Alternative 10
Error	0.8
Cost	32064

\[x1 + \left(3 \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) - 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} + x1 \cdot \left(x1 \cdot \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1}\right)\right) + \left(x1 \cdot x1 + 1\right) \cdot \left(x1 + \left(\left(x1 \cdot x1\right) \cdot -6 + \sqrt[3]{\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} \cdot \left(\left(x1 + x1\right) \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} - 3\right) + \left(x1 \cdot x1\right) \cdot 4\right)} \cdot \left(\sqrt[3]{\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} \cdot \left(\left(x1 + x1\right) \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} - 3\right) + \left(x1 \cdot x1\right) \cdot 4\right)} \cdot \sqrt[3]{\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} \cdot \left(\left(x1 + x1\right) \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} - 3\right) + \left(x1 \cdot x1\right) \cdot 4\right)}\right)\right)\right)\right)\]

Alternative 11
Error	0.6
Cost	30656

\[x1 + \left(3 \cdot \frac{\left(x1 \cdot \left(x1 \cdot 3\right) - 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} + \left(x1 + \left(x1 \cdot \left(x1 \cdot x1\right) + \left(\left(x1 \cdot \left(x1 \cdot 3\right)\right) \cdot \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} + \left(x1 \cdot x1 + 1\right) \cdot \left(\left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} - 3\right) \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} \cdot \left(x1 \cdot 2\right)\right) + \sqrt[3]{\left(x1 \cdot x1\right) \cdot \left(-6 + \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} \cdot 4\right)} \cdot \left(\sqrt[3]{\left(x1 \cdot x1\right) \cdot \left(-6 + \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} \cdot 4\right)} \cdot \sqrt[3]{\left(x1 \cdot x1\right) \cdot \left(-6 + \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} \cdot 4\right)}\right)\right)\right)\right)\right)\right)\]

Alternative 12
Error	0.6
Cost	28480

\[x1 + \left(3 \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) - 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} + x1 \cdot \left(x1 \cdot \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1}\right)\right) + \left(x1 \cdot x1 + 1\right) \cdot \left(x1 + \left(\left(x1 \cdot x1\right) \cdot -6 + \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} \cdot \left(\left(x1 \cdot x1\right) \cdot 4 + \left(x1 + x1\right) \cdot \left(\sqrt[3]{\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} - 3} \cdot \left(\sqrt[3]{\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} - 3} \cdot \sqrt[3]{\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} - 3}\right)\right)\right)\right)\right)\right)\]

Alternative 13
Error	0.8
Cost	28224

\[x1 + \left(3 \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) - 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} + x1 \cdot \left(x1 \cdot \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1}\right)\right) + \left(x1 \cdot x1 + 1\right) \cdot \left(x1 + \left(\left(x1 \cdot x1\right) \cdot -6 + \left(\sqrt[3]{\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1}} \cdot \sqrt[3]{\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1}}\right) \cdot \left(\left(\left(x1 + x1\right) \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} - 3\right) + \left(x1 \cdot x1\right) \cdot 4\right) \cdot \sqrt[3]{\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1}}\right)\right)\right)\right)\]

Alternative 14
Error	0.8
Cost	27456

\[x1 + \left(3 \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) - 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} + x1 \cdot \left(x1 \cdot \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1}\right)\right) + \left(x1 \cdot x1 + 1\right) \cdot \left(x1 + \left(\left(x1 \cdot x1\right) \cdot -6 + \left(\sqrt[3]{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1} \cdot \sqrt[3]{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}\right) \cdot \left(\left(\left(x1 + x1\right) \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} - 3\right) + \left(x1 \cdot x1\right) \cdot 4\right) \cdot \frac{\sqrt[3]{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}}{x1 \cdot x1 + 1}\right)\right)\right)\right)\]

Alternative 15
Error	0.7
Cost	26816

\[x1 + \left(3 \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) - 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} + x1 \cdot \left(x1 \cdot \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1}\right)\right) + \left(x1 \cdot x1 + 1\right) \cdot \left(x1 + \left(\left(x1 \cdot x1\right) \cdot -6 + \frac{1}{\sqrt[3]{x1 \cdot x1 + 1} \cdot \sqrt[3]{x1 \cdot x1 + 1}} \cdot \left(\left(\left(x1 + x1\right) \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} - 3\right) + \left(x1 \cdot x1\right) \cdot 4\right) \cdot \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{\sqrt[3]{x1 \cdot x1 + 1}}\right)\right)\right)\right)\]

Alternative 16
Error	21.1
Cost	25664

\[x1 + \left(3 \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) - 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} + x1 \cdot \left(x1 \cdot \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1}\right)\right) + \left(x1 \cdot x1 + 1\right) \cdot \left(x1 + \frac{\left(\left(x1 + x1\right) \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} - 3\right) + \left(x1 \cdot x1\right) \cdot 4\right) \cdot \left(\left(\left(x1 + x1\right) \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} - 3\right) + \left(x1 \cdot x1\right) \cdot 4\right) \cdot \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{\frac{{\left(x1 \cdot x1 + 1\right)}^{2}}{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}}\right) + -36 \cdot {x1}^{4}}{\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} \cdot \left(\left(x1 + x1\right) \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} - 3\right) + \left(x1 \cdot x1\right) \cdot 4\right) + \left(x1 \cdot x1\right) \cdot 6}\right)\right)\]

Alternative 17
Error	20.0
Cost	22976

\[x1 + \left(3 \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) - 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} + x1 \cdot \left(x1 \cdot \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1}\right)\right) + \left(x1 \cdot x1 + 1\right) \cdot \left(x1 + \sqrt{\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} \cdot \left(\left(x1 + x1\right) \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} - 3\right) + \left(x1 \cdot x1\right) \cdot 4\right) + \left(x1 \cdot x1\right) \cdot -6} \cdot \sqrt{\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} \cdot \left(\left(x1 + x1\right) \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} - 3\right) + \left(x1 \cdot x1\right) \cdot 4\right) + \left(x1 \cdot x1\right) \cdot -6}\right)\right)\]

Alternative 18
Error	22.7
Cost	22592

\[x1 + \left(3 \cdot \frac{\left(x1 \cdot \left(x1 \cdot 3\right) - 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} + \left(x1 + \left(x1 \cdot \left(x1 \cdot x1\right) + \left(\left(x1 \cdot \left(x1 \cdot 3\right)\right) \cdot \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} + \left(x1 \cdot x1 + 1\right) \cdot \left(\left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} - 3\right) \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} \cdot \left(x1 \cdot 2\right)\right) + \sqrt{\left(x1 \cdot x1\right) \cdot \left(-6 + \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} \cdot 4\right)} \cdot \sqrt{\left(x1 \cdot x1\right) \cdot \left(-6 + \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} \cdot 4\right)}\right)\right)\right)\right)\right)\]

Alternative 19
Error	42.6
Cost	22336

\[x1 + \left(3 \cdot \frac{\left(x1 \cdot \left(x1 \cdot 3\right) - 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} + \left(x1 + \left(x1 \cdot \left(x1 \cdot x1\right) + \left(\left(x1 \cdot \left(x1 \cdot 3\right)\right) \cdot \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} + \left(x1 \cdot x1 + 1\right) \cdot \left(\left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} - 3\right) \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} \cdot \left(x1 \cdot 2\right)\right) + \left(x1 \cdot \sqrt{-6 + \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} \cdot 4}\right) \cdot \left(x1 \cdot \sqrt{-6 + \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} \cdot 4}\right)\right)\right)\right)\right)\right)\]

Alternative 20
Error	27.0
Cost	21440

\[x1 + \left(3 \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) - 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} + x1 \cdot \left(x1 \cdot \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1}\right)\right) + \left(x1 \cdot x1 + 1\right) \cdot \left(x1 + \left(\left(x1 \cdot x1\right) \cdot -6 + \sqrt{\left(x1 + x1\right) \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} - 3\right) + \left(x1 \cdot x1\right) \cdot 4} \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} \cdot \sqrt{\left(x1 + x1\right) \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} - 3\right) + \left(x1 \cdot x1\right) \cdot 4}\right)\right)\right)\right)\]

Alternative 21
Error	0.5
Cost	21312

\[x1 + \left(3 \cdot \frac{\left(x1 \cdot \left(x1 \cdot 3\right) - 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} + \left(x1 + \left(x1 \cdot \left(x1 \cdot x1\right) + \left(\left(x1 \cdot \left(x1 \cdot 3\right)\right) \cdot \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} + \left(x1 \cdot x1 + 1\right) \cdot \left(\left(\left(x1 \cdot x1\right) \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} \cdot 4\right) + \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} - 3\right) \cdot \left(2 \cdot \left(x1 \cdot \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1}\right)\right)\right) - \left(x1 \cdot x1\right) \cdot \left(\sqrt{6} \cdot \sqrt{6}\right)\right)\right)\right)\right)\right)\]

Alternative 22
Error	44.9
Cost	20800

\[x1 + \left(3 \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) - 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} + x1 \cdot \left(x1 \cdot \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1}\right)\right) + \left(x1 \cdot x1 + 1\right) \cdot \left(x1 + \left(\left(x1 \cdot x1\right) \cdot -6 + \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} \cdot \left(\left(x1 \cdot x1\right) \cdot 4 + \left(x1 + x1\right) \cdot \left(\sqrt{\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} - 3} \cdot \sqrt{\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} - 3}\right)\right)\right)\right)\right)\]

Alternative 23
Error	27.9
Cost	20672

\[x1 + \left(3 \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) - 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} + x1 \cdot \left(x1 \cdot \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1}\right)\right) + \left(x1 \cdot x1 + 1\right) \cdot \left(x1 + \left(\left(x1 \cdot x1\right) \cdot -6 + \sqrt{\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1}} \cdot \left(\left(\left(x1 + x1\right) \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} - 3\right) + \left(x1 \cdot x1\right) \cdot 4\right) \cdot \sqrt{\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1}}\right)\right)\right)\right)\]

Alternative 24
Error	27.9
Cost	20288

\[x1 + \left(3 \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) - 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} + x1 \cdot \left(x1 \cdot \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1}\right)\right) + \left(x1 \cdot x1 + 1\right) \cdot \left(x1 + \left(\left(x1 \cdot x1\right) \cdot -6 + \sqrt{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1} \cdot \left(\left(\left(x1 + x1\right) \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} - 3\right) + \left(x1 \cdot x1\right) \cdot 4\right) \cdot \frac{\sqrt{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}}{x1 \cdot x1 + 1}\right)\right)\right)\right)\]

Alternative 25
Error	2.9
Cost	20160

\[x1 + \left(3 \cdot \frac{\left(x1 \cdot \left(x1 \cdot 3\right) - 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} + \left(x1 + \left(x1 \cdot \left(x1 \cdot x1\right) + \left(\left(x1 \cdot \left(x1 \cdot 3\right)\right) \cdot \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} + \left(x1 \cdot x1 + 1\right) \cdot \left(\left(\left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} - 3\right) \cdot \left(2 \cdot \left(x1 \cdot \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1}\right)\right) + \left(x1 \cdot x1\right) \cdot 12\right) - \left(x1 \cdot x1\right) \cdot \left(\sqrt{6} \cdot \sqrt{6}\right)\right)\right)\right)\right)\right)\]

Alternative 26
Error	0.6
Cost	20032

\[x1 + \left(3 \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) - 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} + x1 \cdot \left(x1 \cdot \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1}\right)\right) + \left(x1 \cdot x1 + 1\right) \cdot \left(x1 + \left(\left(x1 \cdot x1\right) \cdot -6 + \frac{1}{\sqrt{x1 \cdot x1 + 1}} \cdot \left(\left(\left(x1 + x1\right) \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} - 3\right) + \left(x1 \cdot x1\right) \cdot 4\right) \cdot \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{\sqrt{x1 \cdot x1 + 1}}\right)\right)\right)\right)\]

Alternative 27
Error	15.9
Cost	19584

\[x1 + \left(3 \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) - 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} + x1 \cdot \left(x1 \cdot \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1}\right)\right) + \left(x1 \cdot x1 + 1\right) \cdot \left(x1 + \left(\left(x1 \cdot x1\right) \cdot -6 + \sqrt[3]{{\left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} \cdot \left(\left(x1 + x1\right) \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} - 3\right) + \left(x1 \cdot x1\right) \cdot 4\right)\right)}^{3}}\right)\right)\right)\]

Alternative 28
Error	15.9
Cost	19584

\[x1 + \left(3 \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) - 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} + x1 \cdot \left(x1 \cdot \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1}\right)\right) + \left(x1 \cdot x1 + 1\right) \cdot \left(x1 + \sqrt[3]{{\left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} \cdot \left(\left(x1 + x1\right) \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} - 3\right) + \left(x1 \cdot x1\right) \cdot 4\right) + \left(x1 \cdot x1\right) \cdot -6\right)}^{3}}\right)\right)\]

Alternative 29
Error	13.7
Cost	18688

\[x1 + \left(3 \cdot \frac{\left(x1 \cdot \left(x1 \cdot 3\right) - 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} + \left(x1 + \left(x1 \cdot \left(x1 \cdot x1\right) + \left(\left(x1 \cdot \left(x1 \cdot 3\right)\right) \cdot \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} + \left(x1 \cdot x1 + 1\right) \cdot \left(\left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} - 3\right) \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} \cdot \left(x1 \cdot 2\right)\right) + \frac{\left(x1 \cdot x1\right) \cdot \left({\left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} \cdot 4\right)}^{3} - 216\right)}{\left(36 + 6 \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} \cdot 4\right)\right) + \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} \cdot 4\right) \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} \cdot 4\right)}\right)\right)\right)\right)\right)\]

Alternative 30
Error	10.3
Cost	18560

\[x1 + \left(3 \cdot \frac{\left(x1 \cdot \left(x1 \cdot 3\right) - 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} + \left(x1 + \left(x1 \cdot \left(x1 \cdot x1\right) + \left(\left(x1 \cdot \left(x1 \cdot 3\right)\right) \cdot \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} + \left(x1 \cdot x1 + 1\right) \cdot \frac{\left(6 + \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} \cdot 4\right) \cdot \left(\left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} - 3\right) \cdot \left(\left(\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1\right) \cdot \left(x1 \cdot 2\right)\right)\right) + \left(x1 \cdot x1 + 1\right) \cdot \left(\left(x1 \cdot x1\right) \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{\frac{{\left(x1 \cdot x1 + 1\right)}^{2}}{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}} \cdot 16 + -36\right)\right)}{\left(x1 \cdot x1 + 1\right) \cdot \left(6 + \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} \cdot 4\right)}\right)\right)\right)\right)\]

Alternative 31
Error	8.1
Cost	16768

\[x1 + \left(3 \cdot \frac{\left(x1 \cdot \left(x1 \cdot 3\right) - 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} + \left(x1 + \left(x1 \cdot \left(x1 \cdot x1\right) + \left(\left(x1 \cdot \left(x1 \cdot 3\right)\right) \cdot \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} + \left(x1 \cdot x1 + 1\right) \cdot \left(\left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} - 3\right) \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} \cdot \left(x1 \cdot 2\right)\right) + \frac{\left(x1 \cdot x1\right) \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{\frac{{\left(x1 \cdot x1 + 1\right)}^{2}}{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}} \cdot 16 + -36\right)}{6 + \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} \cdot 4}\right)\right)\right)\right)\right)\]

Alternative 32
Error	13.6
Cost	16384

\[x1 + \left(3 \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) - 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} + x1 \cdot \left(x1 \cdot \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1}\right)\right) + \left(x1 \cdot x1 + 1\right) \cdot \left(x1 + \left(\left(x1 \cdot x1\right) \cdot -6 + \frac{\left(\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1\right) \cdot \left(\left(\left(x1 \cdot x1\right) \cdot 4\right) \cdot \left(\left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} - 3\right) \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} - 3\right)\right) - 16 \cdot {x1}^{4}\right)}{\left(x1 \cdot x1 + 1\right) \cdot \left(\left(x1 + x1\right) \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} - 3\right) - \left(x1 \cdot x1\right) \cdot 4\right)}\right)\right)\right)\]

Alternative 33
Error	8.0
Cost	15232

\[x1 + \left(3 \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) - 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} + x1 \cdot \left(x1 \cdot \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1}\right)\right) + \left(x1 \cdot x1 + 1\right) \cdot \left(x1 + \left(\left(x1 \cdot x1\right) \cdot -6 + \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} \cdot \left(\left(x1 \cdot x1\right) \cdot 4 + \left(x1 + x1\right) \cdot \frac{\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{\frac{{\left(x1 \cdot x1 + 1\right)}^{2}}{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}} + -9}{3 + \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1}}\right)\right)\right)\right)\]

Alternative 34
Error	0.5
Cost	8128

\[x1 + \left(3 \cdot \frac{\left(x1 \cdot \left(x1 \cdot 3\right) - 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} + \left(x1 + \left(x1 \cdot \left(x1 \cdot x1\right) + \left(\left(x1 \cdot \left(x1 \cdot 3\right)\right) \cdot \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} + \left(x1 \cdot x1 + 1\right) \cdot \left(\left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} - 3\right) \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} \cdot \left(x1 \cdot 2\right)\right) + \left(x1 \cdot x1\right) \cdot \left(-6 + \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} \cdot 4\right)\right)\right)\right)\right)\right)\]

Alternative 35
Error	0.5
Cost	8128

\[x1 + \left(3 \cdot \frac{\left(x1 \cdot \left(x1 \cdot 3\right) - 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} + \left(x1 + \left(x1 \cdot \left(x1 \cdot x1\right) + \left(\left(x1 \cdot \left(x1 \cdot 3\right)\right) \cdot \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} + \left(x1 \cdot x1 + 1\right) \cdot \left(\left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} - 3\right) \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} \cdot \left(x1 \cdot 2\right)\right) + x1 \cdot \left(x1 \cdot \left(-6 + \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} \cdot 4\right)\right)\right)\right)\right)\right)\right)\]

Alternative 36
Error	0.5
Cost	7872

\[x1 + \left(3 \cdot \frac{\left(x1 \cdot \left(x1 \cdot 3\right) - 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} + \left(x1 + \left(x1 \cdot \left(x1 \cdot x1\right) + \left(\left(x1 \cdot x1 + 1\right) \cdot \left(\left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} - 3\right) \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} \cdot \left(x1 \cdot 2\right)\right) + \left(x1 \cdot x1\right) \cdot \left(-6 + \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} \cdot 4\right)\right) + 3 \cdot \frac{\left(x1 \cdot x1\right) \cdot \left(x1 \cdot \left(x1 \cdot 3\right) - x1\right)}{x1 \cdot x1 + 1}\right)\right)\right)\right)\]

Alternative 37
Error	0.5
Cost	7616

\[x1 + \left(3 \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) - 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} + x1 \cdot \left(x1 \cdot \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1}\right)\right) + \left(x1 \cdot x1 + 1\right) \cdot \left(x1 + \left(\left(x1 \cdot x1\right) \cdot \left(-6 + \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} \cdot 4\right) + \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} \cdot \left(\left(x1 + x1\right) \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} - 3\right)\right)\right)\right)\right)\]

Alternative 38
Error	0.5
Cost	7360

\[x1 + \left(3 \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) - 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} + x1 \cdot \left(x1 \cdot \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1}\right)\right) + \left(x1 \cdot x1 + 1\right) \cdot \left(x1 + \left(\left(x1 \cdot x1\right) \cdot -6 + \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{\left(x1 \cdot x1\right) \cdot \left(x1 \cdot x1\right) - 1} \cdot \left(\left(\left(x1 + x1\right) \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} - 3\right) + \left(x1 \cdot x1\right) \cdot 4\right) \cdot \left(x1 \cdot x1 + -1\right)\right)\right)\right)\right)\]

Alternative 39
Error	12.0
Cost	7360

\[x1 + \left(3 \cdot \frac{\left(x1 \cdot \left(x1 \cdot 3\right) - 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} + \left(x1 + \left(x1 \cdot \left(x1 \cdot x1\right) + \left(\left(x1 \cdot \left(x1 \cdot 3\right)\right) \cdot \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} + \left(x1 \cdot x1 + 1\right) \cdot \left(\left(x1 \cdot x1\right) \cdot \left(-6 + \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} \cdot 4\right) + \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} \cdot \left(x1 \cdot 2\right)\right) \cdot \left(2 \cdot x2 - \left(x1 + 3\right)\right)\right)\right)\right)\right)\right)\]

Alternative 40
Error	0.5
Cost	6720

\[x1 + \left(3 \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) - 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} + x1 \cdot \left(x1 \cdot \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1}\right)\right) + \left(x1 \cdot x1 + 1\right) \cdot \left(x1 + \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} \cdot \left(\left(x1 + x1\right) \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} - 3\right) + \left(x1 \cdot x1\right) \cdot 4\right) + \left(x1 \cdot x1\right) \cdot -6\right)\right)\right)\]

Alternative 41
Error	0.5
Cost	6720

\[x1 + \left(3 \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) - 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} + x1 \cdot \left(x1 \cdot \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1}\right)\right) + \left(x1 \cdot x1 + 1\right) \cdot \left(x1 + \left(\left(x1 \cdot x1\right) \cdot -6 + \frac{\left(\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1\right) \cdot \left(\left(x1 + x1\right) \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} - 3\right) + \left(x1 \cdot x1\right) \cdot 4\right)}{x1 \cdot x1 + 1}\right)\right)\right)\]

Alternative 42
Error	51.7
Cost	6592

\[x1 + \left(3 \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) - 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} + x1 \cdot \left(x1 \cdot \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1}\right)\right) + \left(x1 \cdot x1 + 1\right) \cdot \left(x1 + \left(\left(x1 \cdot x1\right) \cdot -6 + \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} \cdot \left(\left(x1 \cdot x1\right) \cdot 4 + \left(x1 + x1\right) \cdot \left(2 \cdot \frac{x2}{x1 \cdot x1} - \left(\frac{1}{x1} + \frac{3}{x1 \cdot x1}\right)\right)\right)\right)\right)\right)\]

Alternative 43
Error	51.7
Cost	6592

\[x1 + \left(3 \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) - 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} + x1 \cdot \left(x1 \cdot \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1}\right)\right) + \left(x1 \cdot x1 + 1\right) \cdot \left(x1 + \left(\left(x1 \cdot x1\right) \cdot -6 + \left(\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1\right) \cdot \frac{\left(x1 \cdot x1\right) \cdot 4 + \left(x1 + x1\right) \cdot \left(2 \cdot \frac{x2}{x1 \cdot x1} - \left(\frac{1}{x1} + \frac{3}{x1 \cdot x1}\right)\right)}{x1 \cdot x1 + 1}\right)\right)\right)\]

Alternative 44
Error	44.2
Cost	6464

\[x1 + \left(\left(x1 \cdot x1 + 1\right) \cdot \left(x1 + \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} \cdot \left(\left(x1 + x1\right) \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} - 3\right) + \left(x1 \cdot x1\right) \cdot 4\right) + \left(x1 \cdot x1\right) \cdot -6\right)\right) + 3 \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) - 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} + \left(\left(2 \cdot x2 - \left(x1 + 3\right)\right) + \left(x1 \cdot \left(x1 \cdot 3\right) + \frac{1}{x1}\right)\right)\right)\right)\]

Alternative 45
Error	1.5
Cost	6080

\[x1 + \left(3 \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) - 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} + x1 \cdot \left(x1 \cdot \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1}\right)\right) + \left(x1 \cdot x1 + 1\right) \cdot \left(x1 + \left(\left(x1 \cdot x1\right) \cdot -6 + \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} \cdot \left(\left(x1 \cdot x1\right) \cdot 4 + \left(x1 + x1\right) \cdot \left(2 \cdot \frac{x2}{x1 \cdot x1 + 1}\right)\right)\right)\right)\right)\]

Alternative 46
Error	1.5
Cost	6080

\[x1 + \left(3 \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) - 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} + x1 \cdot \left(x1 \cdot \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1}\right)\right) + \left(x1 \cdot x1 + 1\right) \cdot \left(x1 + \left(\left(x1 \cdot x1\right) \cdot -6 + \left(\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1\right) \cdot \frac{\left(x1 \cdot x1\right) \cdot 4 + \left(x1 + x1\right) \cdot \left(2 \cdot \frac{x2}{x1 \cdot x1 + 1}\right)}{x1 \cdot x1 + 1}\right)\right)\right)\]

Alternative 47
Error	12.0
Cost	5952

\[x1 + \left(3 \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) - 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} + x1 \cdot \left(x1 \cdot \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1}\right)\right) + \left(x1 \cdot x1 + 1\right) \cdot \left(x1 + \left(\left(x1 \cdot x1\right) \cdot -6 + \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} \cdot \left(\left(x1 \cdot x1\right) \cdot 4 + \left(x1 + x1\right) \cdot \left(2 \cdot x2 - \left(x1 + 3\right)\right)\right)\right)\right)\right)\]

Alternative 48
Error	2.0
Cost	5824

\[x1 + \left(3 \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) - 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} + 2 \cdot \left(x1 \cdot \left(x1 \cdot x2\right)\right)\right) + \left(x1 \cdot x1 + 1\right) \cdot \left(x1 + \left(\left(x1 \cdot x1\right) \cdot -6 + \left(\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1\right) \cdot \frac{\left(x1 + x1\right) \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} - 3\right) + \left(x1 \cdot x1\right) \cdot 4}{x1 \cdot x1 + 1}\right)\right)\right)\]

Alternative 49
Error	2.0
Cost	5824

\[x1 + \left(3 \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) - 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} + 2 \cdot \left(x1 \cdot \left(x1 \cdot x2\right)\right)\right) + \left(x1 \cdot x1 + 1\right) \cdot \left(x1 + \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} \cdot \left(\left(x1 + x1\right) \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} - 3\right) + \left(x1 \cdot x1\right) \cdot 4\right) + \left(x1 \cdot x1\right) \cdot -6\right)\right)\right)\]

Alternative 50
Error	4.8
Cost	5824

\[x1 + \left(3 \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) - 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} + x1 \cdot \left(x1 \cdot \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1}\right)\right) + \left(x1 \cdot x1 + 1\right) \cdot \left(x1 + \left(\left(x1 \cdot x1\right) \cdot -6 + \left(\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1\right) \cdot \frac{\left(x1 \cdot x1\right) \cdot 4 + \left(x1 + x1\right) \cdot \left(2 \cdot x2 + -3\right)}{x1 \cdot x1 + 1}\right)\right)\right)\]

Alternative 51
Error	4.8
Cost	5824

\[x1 + \left(3 \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) - 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} + x1 \cdot \left(x1 \cdot \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1}\right)\right) + \left(x1 \cdot x1 + 1\right) \cdot \left(x1 + \left(\left(x1 \cdot x1\right) \cdot -6 + \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} \cdot \left(\left(x1 \cdot x1\right) \cdot 4 + \left(x1 + x1\right) \cdot \left(2 \cdot x2 + -3\right)\right)\right)\right)\right)\]

Alternative 52
Error	1.4
Cost	5696

\[x1 + \left(\left(x1 \cdot x1 + 1\right) \cdot \left(x1 + \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} \cdot \left(\left(x1 + x1\right) \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} - 3\right) + \left(x1 \cdot x1\right) \cdot 4\right) + \left(x1 \cdot x1\right) \cdot -6\right)\right) + 3 \cdot \left(x1 \cdot \left(x1 \cdot 3\right) + \frac{\left(x1 \cdot \left(x1 \cdot 3\right) - 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1}\right)\right)\]

Alternative 53
Error	1.4
Cost	5696

\[x1 + \left(\left(x1 \cdot x1 + 1\right) \cdot \left(x1 + \left(\left(x1 \cdot x1\right) \cdot -6 + \left(\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1\right) \cdot \frac{\left(x1 + x1\right) \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} - 3\right) + \left(x1 \cdot x1\right) \cdot 4}{x1 \cdot x1 + 1}\right)\right) + 3 \cdot \left(x1 \cdot \left(x1 \cdot 3\right) + \frac{\left(x1 \cdot \left(x1 \cdot 3\right) - 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1}\right)\right)\]

Alternative 54
Error	47.7
Cost	5696

\[x1 + \left(3 \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) - 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} + x1 \cdot \left(x1 \cdot \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1}\right)\right) + \left(x1 \cdot x1 + 1\right) \cdot \left(x1 + \left(\left(x1 \cdot x1\right) \cdot -6 + \left(\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1\right) \cdot \frac{\left(x1 \cdot x1\right) \cdot 4 + \left(x1 + x1\right) \cdot \frac{-1}{x1}}{x1 \cdot x1 + 1}\right)\right)\right)\]

Alternative 55
Error	52.3
Cost	4288

\[x1 + \left(3 \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) - 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} + x1 \cdot \left(x1 \cdot \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1}\right)\right) + \left(x1 \cdot x1 + 1\right) \cdot \left(x1 + \left(\left(\left(x1 \cdot x1\right) \cdot 6 + x2 \cdot 8\right) - \left(x1 \cdot 4 + 18\right)\right)\right)\right)\]

Alternative 56
Error	24.2
Cost	4288

\[x1 + \left(3 \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) - 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} + x1 \cdot \left(x1 \cdot \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1}\right)\right) + \left(x1 \cdot x1 + 1\right) \cdot \left(x1 + \left(\left(x1 \cdot x1\right) \cdot -6 + \left(\left(x1 \cdot x1\right) \cdot 12 - x1 \cdot 4\right)\right)\right)\right)\]

Alternative 57
Error	19.7
Cost	4032

\[x1 + \left(3 \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) - 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} + x1 \cdot \left(x1 \cdot \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1}\right)\right) + \left(x1 \cdot x1 + 1\right) \cdot \left(x1 + x1 \cdot \left(8 \cdot \left(x2 \cdot x2\right) - x2 \cdot 12\right)\right)\right)\]

Alternative 58
Error	24.2
Cost	3904

\[x1 + \left(3 \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) - 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} + x1 \cdot \left(x1 \cdot \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1}\right)\right) + \left(x1 \cdot x1 + 1\right) \cdot \left(x1 + \left(\left(x1 \cdot x1\right) \cdot 6 - x1 \cdot 4\right)\right)\right)\]

Alternative 59
Error	12.2
Cost	3648

\[x1 + \left(3 \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) - 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} + x1 \cdot \left(x1 \cdot \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1}\right)\right) + \left(x1 \cdot x1 + 1\right) \cdot \left(x1 + \left(x1 \cdot x1\right) \cdot 6\right)\right)\]

Alternative 60
Error	61.4
Cost	64

\[1\]

Alternative 61
Error	61.9
Cost	64

\[0\]

Alternative 62
Error	61.8
Cost	64

\[-1\]

Derivation

1. Initial program 0.5

   \[x1 + \left(\left(\left(\left(\left(\left(\left(2 \cdot x1\right) \cdot \frac{\left(\left(3 \cdot x1\right) \cdot x1 + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1}\right) \cdot \left(\frac{\left(\left(3 \cdot x1\right) \cdot x1 + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} - 3\right) + \left(x1 \cdot x1\right) \cdot \left(4 \cdot \frac{\left(\left(3 \cdot x1\right) \cdot x1 + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} - 6\right)\right) \cdot \left(x1 \cdot x1 + 1\right) + \left(\left(3 \cdot x1\right) \cdot x1\right) \cdot \frac{\left(\left(3 \cdot x1\right) \cdot x1 + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1}\right) + \left(x1 \cdot x1\right) \cdot x1\right) + x1\right) + 3 \cdot \frac{\left(\left(3 \cdot x1\right) \cdot x1 - 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1}\right)\]

2. Simplified 0.5

   \[\leadsto \color{blue}{x1 + \left(3 \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) - 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} + x1 \cdot \left(x1 \cdot \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1}\right)\right) + \left(x1 \cdot x1 + 1\right) \cdot \left(\left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} \cdot \left(\left(x1 + x1\right) \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} - 3\right) + \left(x1 \cdot x1\right) \cdot 4\right) + \left(x1 \cdot x1\right) \cdot -6\right) + x1\right)\right)}\]
3. Using strategy rm

4. Applied div-inv_binary64 0.5

   \[\leadsto x1 + \left(3 \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) - 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} + x1 \cdot \left(x1 \cdot \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1}\right)\right) + \left(x1 \cdot x1 + 1\right) \cdot \left(\left(\color{blue}{\left(\left(\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1\right) \cdot \frac{1}{x1 \cdot x1 + 1}\right)} \cdot \left(\left(x1 + x1\right) \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} - 3\right) + \left(x1 \cdot x1\right) \cdot 4\right) + \left(x1 \cdot x1\right) \cdot -6\right) + x1\right)\right)\]

5. Applied associate-*l*_binary64 0.5

   \[\leadsto x1 + \left(3 \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) - 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} + x1 \cdot \left(x1 \cdot \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1}\right)\right) + \left(x1 \cdot x1 + 1\right) \cdot \left(\left(\color{blue}{\left(\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1\right) \cdot \left(\frac{1}{x1 \cdot x1 + 1} \cdot \left(\left(x1 + x1\right) \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} - 3\right) + \left(x1 \cdot x1\right) \cdot 4\right)\right)} + \left(x1 \cdot x1\right) \cdot -6\right) + x1\right)\right)\]

6. Simplified 0.5

   \[\leadsto x1 + \left(3 \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) - 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} + x1 \cdot \left(x1 \cdot \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1}\right)\right) + \left(x1 \cdot x1 + 1\right) \cdot \left(\left(\left(\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1\right) \cdot \color{blue}{\frac{\left(x1 + x1\right) \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} - 3\right) + \left(x1 \cdot x1\right) \cdot 4}{x1 \cdot x1 + 1}} + \left(x1 \cdot x1\right) \cdot -6\right) + x1\right)\right)\]

7. Simplified 0.5

   \[\leadsto \color{blue}{x1 + \left(3 \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) - 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} + x1 \cdot \left(x1 \cdot \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1}\right)\right) + \left(x1 \cdot x1 + 1\right) \cdot \left(x1 + \left(\left(x1 \cdot x1\right) \cdot -6 + \left(\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1\right) \cdot \frac{\left(x1 + x1\right) \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} - 3\right) + \left(x1 \cdot x1\right) \cdot 4}{x1 \cdot x1 + 1}\right)\right)\right)}\]

8. Final simplification 0.5

   \[\leadsto x1 + \left(3 \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) - 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} + x1 \cdot \left(x1 \cdot \frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1}\right)\right) + \left(x1 \cdot x1 + 1\right) \cdot \left(x1 + \left(\left(x1 \cdot x1\right) \cdot -6 + \left(\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1\right) \cdot \frac{\left(x1 + x1\right) \cdot \left(\frac{\left(x1 \cdot \left(x1 \cdot 3\right) + 2 \cdot x2\right) - x1}{x1 \cdot x1 + 1} - 3\right) + \left(x1 \cdot x1\right) \cdot 4}{x1 \cdot x1 + 1}\right)\right)\right)\]

Reproduce

herbie shell --seed 2021022 
(FPCore (x1 x2)
  :name "Rosa's FloatVsDoubleBenchmark"
  :precision binary64
  (+ x1 (+ (+ (+ (+ (* (+ (* (* (* 2.0 x1) (/ (- (+ (* (* 3.0 x1) x1) (* 2.0 x2)) x1) (+ (* x1 x1) 1.0))) (- (/ (- (+ (* (* 3.0 x1) x1) (* 2.0 x2)) x1) (+ (* x1 x1) 1.0)) 3.0)) (* (* x1 x1) (- (* 4.0 (/ (- (+ (* (* 3.0 x1) x1) (* 2.0 x2)) x1) (+ (* x1 x1) 1.0))) 6.0))) (+ (* x1 x1) 1.0)) (* (* (* 3.0 x1) x1) (/ (- (+ (* (* 3.0 x1) x1) (* 2.0 x2)) x1) (+ (* x1 x1) 1.0)))) (* (* x1 x1) x1)) x1) (* 3.0 (/ (- (- (* (* 3.0 x1) x1) (* 2.0 x2)) x1) (+ (* x1 x1) 1.0))))))