Simplification of discriminant from scale-rotated-ellipse

Percentage Accurate: 24.8% → 93.5%

Time: 44.5s

Alternatives: 5

Speedup: 1693.0×

• 32.8% of points produce a very large (infinite) output. You may want to add a precondition.

Specification

Math

\[\begin{array}{l} \\ \begin{array}{l} t_0 := \frac{angle}{180} \cdot \pi\\ t_1 := \sin t\_0\\ t_2 := \cos t\_0\\ t_3 := \frac{\frac{\left(\left(2 \cdot \left({b}^{2} - {a}^{2}\right)\right) \cdot t\_1\right) \cdot t\_2}{x-scale}}{y-scale}\\ t\_3 \cdot t\_3 - \left(4 \cdot \frac{\frac{{\left(a \cdot t\_1\right)}^{2} + {\left(b \cdot t\_2\right)}^{2}}{x-scale}}{x-scale}\right) \cdot \frac{\frac{{\left(a \cdot t\_2\right)}^{2} + {\left(b \cdot t\_1\right)}^{2}}{y-scale}}{y-scale} \end{array} \end{array} \]

FPCore

(FPCore (a b angle x-scale y-scale)
 :precision binary64
 (let* ((t_0 (* (/ angle 180.0) PI))
        (t_1 (sin t_0))
        (t_2 (cos t_0))
        (t_3
         (/
          (/ (* (* (* 2.0 (- (pow b 2.0) (pow a 2.0))) t_1) t_2) x-scale)
          y-scale)))
   (-
    (* t_3 t_3)
    (*
     (*
      4.0
      (/ (/ (+ (pow (* a t_1) 2.0) (pow (* b t_2) 2.0)) x-scale) x-scale))
     (/ (/ (+ (pow (* a t_2) 2.0) (pow (* b t_1) 2.0)) y-scale) y-scale)))))

C

double code(double a, double b, double angle, double x_45_scale, double y_45_scale) {
	double t_0 = (angle / 180.0) * ((double) M_PI);
	double t_1 = sin(t_0);
	double t_2 = cos(t_0);
	double t_3 = ((((2.0 * (pow(b, 2.0) - pow(a, 2.0))) * t_1) * t_2) / x_45_scale) / y_45_scale;
	return (t_3 * t_3) - ((4.0 * (((pow((a * t_1), 2.0) + pow((b * t_2), 2.0)) / x_45_scale) / x_45_scale)) * (((pow((a * t_2), 2.0) + pow((b * t_1), 2.0)) / y_45_scale) / y_45_scale));
}

Java

public static double code(double a, double b, double angle, double x_45_scale, double y_45_scale) {
	double t_0 = (angle / 180.0) * Math.PI;
	double t_1 = Math.sin(t_0);
	double t_2 = Math.cos(t_0);
	double t_3 = ((((2.0 * (Math.pow(b, 2.0) - Math.pow(a, 2.0))) * t_1) * t_2) / x_45_scale) / y_45_scale;
	return (t_3 * t_3) - ((4.0 * (((Math.pow((a * t_1), 2.0) + Math.pow((b * t_2), 2.0)) / x_45_scale) / x_45_scale)) * (((Math.pow((a * t_2), 2.0) + Math.pow((b * t_1), 2.0)) / y_45_scale) / y_45_scale));
}

Python

def code(a, b, angle, x_45_scale, y_45_scale):
	t_0 = (angle / 180.0) * math.pi
	t_1 = math.sin(t_0)
	t_2 = math.cos(t_0)
	t_3 = ((((2.0 * (math.pow(b, 2.0) - math.pow(a, 2.0))) * t_1) * t_2) / x_45_scale) / y_45_scale
	return (t_3 * t_3) - ((4.0 * (((math.pow((a * t_1), 2.0) + math.pow((b * t_2), 2.0)) / x_45_scale) / x_45_scale)) * (((math.pow((a * t_2), 2.0) + math.pow((b * t_1), 2.0)) / y_45_scale) / y_45_scale))

Julia

function code(a, b, angle, x_45_scale, y_45_scale)
	t_0 = Float64(Float64(angle / 180.0) * pi)
	t_1 = sin(t_0)
	t_2 = cos(t_0)
	t_3 = Float64(Float64(Float64(Float64(Float64(2.0 * Float64((b ^ 2.0) - (a ^ 2.0))) * t_1) * t_2) / x_45_scale) / y_45_scale)
	return Float64(Float64(t_3 * t_3) - Float64(Float64(4.0 * Float64(Float64(Float64((Float64(a * t_1) ^ 2.0) + (Float64(b * t_2) ^ 2.0)) / x_45_scale) / x_45_scale)) * Float64(Float64(Float64((Float64(a * t_2) ^ 2.0) + (Float64(b * t_1) ^ 2.0)) / y_45_scale) / y_45_scale)))
end

MATLAB

function tmp = code(a, b, angle, x_45_scale, y_45_scale)
	t_0 = (angle / 180.0) * pi;
	t_1 = sin(t_0);
	t_2 = cos(t_0);
	t_3 = ((((2.0 * ((b ^ 2.0) - (a ^ 2.0))) * t_1) * t_2) / x_45_scale) / y_45_scale;
	tmp = (t_3 * t_3) - ((4.0 * (((((a * t_1) ^ 2.0) + ((b * t_2) ^ 2.0)) / x_45_scale) / x_45_scale)) * (((((a * t_2) ^ 2.0) + ((b * t_1) ^ 2.0)) / y_45_scale) / y_45_scale));
end

Wolfram

code[a_, b_, angle_, x$45$scale_, y$45$scale_] := Block[{t$95$0 = N[(N[(angle / 180.0), $MachinePrecision] * Pi), $MachinePrecision]}, Block[{t$95$1 = N[Sin[t$95$0], $MachinePrecision]}, Block[{t$95$2 = N[Cos[t$95$0], $MachinePrecision]}, Block[{t$95$3 = N[(N[(N[(N[(N[(2.0 * N[(N[Power[b, 2.0], $MachinePrecision] - N[Power[a, 2.0], $MachinePrecision]), $MachinePrecision]), $MachinePrecision] * t$95$1), $MachinePrecision] * t$95$2), $MachinePrecision] / x$45$scale), $MachinePrecision] / y$45$scale), $MachinePrecision]}, N[(N[(t$95$3 * t$95$3), $MachinePrecision] - N[(N[(4.0 * N[(N[(N[(N[Power[N[(a * t$95$1), $MachinePrecision], 2.0], $MachinePrecision] + N[Power[N[(b * t$95$2), $MachinePrecision], 2.0], $MachinePrecision]), $MachinePrecision] / x$45$scale), $MachinePrecision] / x$45$scale), $MachinePrecision]), $MachinePrecision] * N[(N[(N[(N[Power[N[(a * t$95$2), $MachinePrecision], 2.0], $MachinePrecision] + N[Power[N[(b * t$95$1), $MachinePrecision], 2.0], $MachinePrecision]), $MachinePrecision] / y$45$scale), $MachinePrecision] / y$45$scale), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]]]]]

Initial Program: 24.8% accurate, 1.0× speedup

Math

\[\begin{array}{l} \\ \begin{array}{l} t_0 := \frac{angle}{180} \cdot \pi\\ t_1 := \sin t\_0\\ t_2 := \cos t\_0\\ t_3 := \frac{\frac{\left(\left(2 \cdot \left({b}^{2} - {a}^{2}\right)\right) \cdot t\_1\right) \cdot t\_2}{x-scale}}{y-scale}\\ t\_3 \cdot t\_3 - \left(4 \cdot \frac{\frac{{\left(a \cdot t\_1\right)}^{2} + {\left(b \cdot t\_2\right)}^{2}}{x-scale}}{x-scale}\right) \cdot \frac{\frac{{\left(a \cdot t\_2\right)}^{2} + {\left(b \cdot t\_1\right)}^{2}}{y-scale}}{y-scale} \end{array} \end{array} \]

FPCore

(FPCore (a b angle x-scale y-scale)
 :precision binary64
 (let* ((t_0 (* (/ angle 180.0) PI))
        (t_1 (sin t_0))
        (t_2 (cos t_0))
        (t_3
         (/
          (/ (* (* (* 2.0 (- (pow b 2.0) (pow a 2.0))) t_1) t_2) x-scale)
          y-scale)))
   (-
    (* t_3 t_3)
    (*
     (*
      4.0
      (/ (/ (+ (pow (* a t_1) 2.0) (pow (* b t_2) 2.0)) x-scale) x-scale))
     (/ (/ (+ (pow (* a t_2) 2.0) (pow (* b t_1) 2.0)) y-scale) y-scale)))))

C

double code(double a, double b, double angle, double x_45_scale, double y_45_scale) {
	double t_0 = (angle / 180.0) * ((double) M_PI);
	double t_1 = sin(t_0);
	double t_2 = cos(t_0);
	double t_3 = ((((2.0 * (pow(b, 2.0) - pow(a, 2.0))) * t_1) * t_2) / x_45_scale) / y_45_scale;
	return (t_3 * t_3) - ((4.0 * (((pow((a * t_1), 2.0) + pow((b * t_2), 2.0)) / x_45_scale) / x_45_scale)) * (((pow((a * t_2), 2.0) + pow((b * t_1), 2.0)) / y_45_scale) / y_45_scale));
}

Java

public static double code(double a, double b, double angle, double x_45_scale, double y_45_scale) {
	double t_0 = (angle / 180.0) * Math.PI;
	double t_1 = Math.sin(t_0);
	double t_2 = Math.cos(t_0);
	double t_3 = ((((2.0 * (Math.pow(b, 2.0) - Math.pow(a, 2.0))) * t_1) * t_2) / x_45_scale) / y_45_scale;
	return (t_3 * t_3) - ((4.0 * (((Math.pow((a * t_1), 2.0) + Math.pow((b * t_2), 2.0)) / x_45_scale) / x_45_scale)) * (((Math.pow((a * t_2), 2.0) + Math.pow((b * t_1), 2.0)) / y_45_scale) / y_45_scale));
}

Python

def code(a, b, angle, x_45_scale, y_45_scale):
	t_0 = (angle / 180.0) * math.pi
	t_1 = math.sin(t_0)
	t_2 = math.cos(t_0)
	t_3 = ((((2.0 * (math.pow(b, 2.0) - math.pow(a, 2.0))) * t_1) * t_2) / x_45_scale) / y_45_scale
	return (t_3 * t_3) - ((4.0 * (((math.pow((a * t_1), 2.0) + math.pow((b * t_2), 2.0)) / x_45_scale) / x_45_scale)) * (((math.pow((a * t_2), 2.0) + math.pow((b * t_1), 2.0)) / y_45_scale) / y_45_scale))

Julia

function code(a, b, angle, x_45_scale, y_45_scale)
	t_0 = Float64(Float64(angle / 180.0) * pi)
	t_1 = sin(t_0)
	t_2 = cos(t_0)
	t_3 = Float64(Float64(Float64(Float64(Float64(2.0 * Float64((b ^ 2.0) - (a ^ 2.0))) * t_1) * t_2) / x_45_scale) / y_45_scale)
	return Float64(Float64(t_3 * t_3) - Float64(Float64(4.0 * Float64(Float64(Float64((Float64(a * t_1) ^ 2.0) + (Float64(b * t_2) ^ 2.0)) / x_45_scale) / x_45_scale)) * Float64(Float64(Float64((Float64(a * t_2) ^ 2.0) + (Float64(b * t_1) ^ 2.0)) / y_45_scale) / y_45_scale)))
end

MATLAB

function tmp = code(a, b, angle, x_45_scale, y_45_scale)
	t_0 = (angle / 180.0) * pi;
	t_1 = sin(t_0);
	t_2 = cos(t_0);
	t_3 = ((((2.0 * ((b ^ 2.0) - (a ^ 2.0))) * t_1) * t_2) / x_45_scale) / y_45_scale;
	tmp = (t_3 * t_3) - ((4.0 * (((((a * t_1) ^ 2.0) + ((b * t_2) ^ 2.0)) / x_45_scale) / x_45_scale)) * (((((a * t_2) ^ 2.0) + ((b * t_1) ^ 2.0)) / y_45_scale) / y_45_scale));
end

Wolfram

code[a_, b_, angle_, x$45$scale_, y$45$scale_] := Block[{t$95$0 = N[(N[(angle / 180.0), $MachinePrecision] * Pi), $MachinePrecision]}, Block[{t$95$1 = N[Sin[t$95$0], $MachinePrecision]}, Block[{t$95$2 = N[Cos[t$95$0], $MachinePrecision]}, Block[{t$95$3 = N[(N[(N[(N[(N[(2.0 * N[(N[Power[b, 2.0], $MachinePrecision] - N[Power[a, 2.0], $MachinePrecision]), $MachinePrecision]), $MachinePrecision] * t$95$1), $MachinePrecision] * t$95$2), $MachinePrecision] / x$45$scale), $MachinePrecision] / y$45$scale), $MachinePrecision]}, N[(N[(t$95$3 * t$95$3), $MachinePrecision] - N[(N[(4.0 * N[(N[(N[(N[Power[N[(a * t$95$1), $MachinePrecision], 2.0], $MachinePrecision] + N[Power[N[(b * t$95$2), $MachinePrecision], 2.0], $MachinePrecision]), $MachinePrecision] / x$45$scale), $MachinePrecision] / x$45$scale), $MachinePrecision]), $MachinePrecision] * N[(N[(N[(N[Power[N[(a * t$95$2), $MachinePrecision], 2.0], $MachinePrecision] + N[Power[N[(b * t$95$1), $MachinePrecision], 2.0], $MachinePrecision]), $MachinePrecision] / y$45$scale), $MachinePrecision] / y$45$scale), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]]]]]

Alternative 1: 93.5% accurate, 15.4× speedup

Math

\[\begin{array}{l} \\ -4 \cdot {\left(\frac{b}{\frac{x-scale}{a} \cdot y-scale}\right)}^{2} \end{array} \]

FPCore

(FPCore (a b angle x-scale y-scale)
 :precision binary64
 (* -4.0 (pow (/ b (* (/ x-scale a) y-scale)) 2.0)))

C

double code(double a, double b, double angle, double x_45_scale, double y_45_scale) {
	return -4.0 * pow((b / ((x_45_scale / a) * y_45_scale)), 2.0);
}

Fortran

real(8) function code(a, b, angle, x_45scale, y_45scale)
    real(8), intent (in) :: a
    real(8), intent (in) :: b
    real(8), intent (in) :: angle
    real(8), intent (in) :: x_45scale
    real(8), intent (in) :: y_45scale
    code = (-4.0d0) * ((b / ((x_45scale / a) * y_45scale)) ** 2.0d0)
end function

Java

public static double code(double a, double b, double angle, double x_45_scale, double y_45_scale) {
	return -4.0 * Math.pow((b / ((x_45_scale / a) * y_45_scale)), 2.0);
}

Python

def code(a, b, angle, x_45_scale, y_45_scale):
	return -4.0 * math.pow((b / ((x_45_scale / a) * y_45_scale)), 2.0)

Julia

function code(a, b, angle, x_45_scale, y_45_scale)
	return Float64(-4.0 * (Float64(b / Float64(Float64(x_45_scale / a) * y_45_scale)) ^ 2.0))
end

MATLAB

function tmp = code(a, b, angle, x_45_scale, y_45_scale)
	tmp = -4.0 * ((b / ((x_45_scale / a) * y_45_scale)) ^ 2.0);
end

Wolfram

code[a_, b_, angle_, x$45$scale_, y$45$scale_] := N[(-4.0 * N[Power[N[(b / N[(N[(x$45$scale / a), $MachinePrecision] * y$45$scale), $MachinePrecision]), $MachinePrecision], 2.0], $MachinePrecision]), $MachinePrecision]

Derivation

1. Initial program 26.8%

   \[\frac{\frac{\left(\left(2 \cdot \left({b}^{2} - {a}^{2}\right)\right) \cdot \sin \left(\frac{angle}{180} \cdot \pi\right)\right) \cdot \cos \left(\frac{angle}{180} \cdot \pi\right)}{x-scale}}{y-scale} \cdot \frac{\frac{\left(\left(2 \cdot \left({b}^{2} - {a}^{2}\right)\right) \cdot \sin \left(\frac{angle}{180} \cdot \pi\right)\right) \cdot \cos \left(\frac{angle}{180} \cdot \pi\right)}{x-scale}}{y-scale} - \left(4 \cdot \frac{\frac{{\left(a \cdot \sin \left(\frac{angle}{180} \cdot \pi\right)\right)}^{2} + {\left(b \cdot \cos \left(\frac{angle}{180} \cdot \pi\right)\right)}^{2}}{x-scale}}{x-scale}\right) \cdot \frac{\frac{{\left(a \cdot \cos \left(\frac{angle}{180} \cdot \pi\right)\right)}^{2} + {\left(b \cdot \sin \left(\frac{angle}{180} \cdot \pi\right)\right)}^{2}}{y-scale}}{y-scale} \]

3. Simplified 22.6%

   \[\leadsto \color{blue}{\frac{\left(2 \cdot \left({b}^{2} - {a}^{2}\right)\right) \cdot \left(\sin \left(\frac{angle}{180} \cdot \pi\right) \cdot \cos \left(\frac{angle}{180} \cdot \pi\right)\right)}{y-scale \cdot x-scale} \cdot \frac{\left(2 \cdot \left({b}^{2} - {a}^{2}\right)\right) \cdot \left(\sin \left(\frac{angle}{180} \cdot \pi\right) \cdot \cos \left(\frac{angle}{180} \cdot \pi\right)\right)}{y-scale \cdot x-scale} - 4 \cdot \left(\frac{{\left(a \cdot \sin \left(\frac{angle}{180} \cdot \pi\right)\right)}^{2} + {\left(b \cdot \cos \left(\frac{angle}{180} \cdot \pi\right)\right)}^{2}}{{x-scale}^{2}} \cdot \frac{{\left(a \cdot \cos \left(\frac{angle}{180} \cdot \pi\right)\right)}^{2} + {\left(b \cdot \sin \left(\frac{angle}{180} \cdot \pi\right)\right)}^{2}}{{y-scale}^{2}}\right)} \]
4. Add Preprocessing

5. Taylor expanded in angle around 0 53.1%

   \[\leadsto \color{blue}{-4 \cdot \frac{{a}^{2} \cdot {b}^{2}}{{x-scale}^{2} \cdot {y-scale}^{2}}} \]
6. Step-by-step derivation

   1. *-commutative 53.1%

      \[\leadsto -4 \cdot \frac{\color{blue}{{b}^{2} \cdot {a}^{2}}}{{x-scale}^{2} \cdot {y-scale}^{2}} \]

   2. unpow2 53.1%

      \[\leadsto -4 \cdot \frac{\color{blue}{\left(b \cdot b\right)} \cdot {a}^{2}}{{x-scale}^{2} \cdot {y-scale}^{2}} \]

   3. unpow2 53.1%

      \[\leadsto -4 \cdot \frac{\left(b \cdot b\right) \cdot \color{blue}{\left(a \cdot a\right)}}{{x-scale}^{2} \cdot {y-scale}^{2}} \]

   4. swap-sqr 64.8%

      \[\leadsto -4 \cdot \frac{\color{blue}{\left(b \cdot a\right) \cdot \left(b \cdot a\right)}}{{x-scale}^{2} \cdot {y-scale}^{2}} \]

   5. unpow2 64.8%

      \[\leadsto -4 \cdot \frac{\color{blue}{{\left(b \cdot a\right)}^{2}}}{{x-scale}^{2} \cdot {y-scale}^{2}} \]

   6. unpow2 64.8%

      \[\leadsto -4 \cdot \frac{{\left(b \cdot a\right)}^{2}}{\color{blue}{\left(x-scale \cdot x-scale\right)} \cdot {y-scale}^{2}} \]

   7. unpow2 64.8%

      \[\leadsto -4 \cdot \frac{{\left(b \cdot a\right)}^{2}}{\left(x-scale \cdot x-scale\right) \cdot \color{blue}{\left(y-scale \cdot y-scale\right)}} \]

   8. swap-sqr 77.3%

      \[\leadsto -4 \cdot \frac{{\left(b \cdot a\right)}^{2}}{\color{blue}{\left(x-scale \cdot y-scale\right) \cdot \left(x-scale \cdot y-scale\right)}} \]

   9. unpow2 77.3%

      \[\leadsto -4 \cdot \frac{{\left(b \cdot a\right)}^{2}}{\color{blue}{{\left(x-scale \cdot y-scale\right)}^{2}}} \]

7. Simplified 77.3%

   \[\leadsto \color{blue}{-4 \cdot \frac{{\left(b \cdot a\right)}^{2}}{{\left(x-scale \cdot y-scale\right)}^{2}}} \]
8. Step-by-step derivation

   1. pow-to-exp 39.5%

      \[\leadsto -4 \cdot \frac{\color{blue}{e^{\log \left(b \cdot a\right) \cdot 2}}}{{\left(x-scale \cdot y-scale\right)}^{2}} \]

   2. pow-to-exp 23.5%

      \[\leadsto -4 \cdot \frac{e^{\log \left(b \cdot a\right) \cdot 2}}{\color{blue}{e^{\log \left(x-scale \cdot y-scale\right) \cdot 2}}} \]

   3. div-exp 26.3%

      \[\leadsto -4 \cdot \color{blue}{e^{\log \left(b \cdot a\right) \cdot 2 - \log \left(x-scale \cdot y-scale\right) \cdot 2}} \]

9. Applied egg-rr 26.3%

   \[\leadsto -4 \cdot \color{blue}{e^{\log \left(b \cdot a\right) \cdot 2 - \log \left(x-scale \cdot y-scale\right) \cdot 2}} \]
10. Step-by-step derivation

    1. *-un-lft-identity 26.3%

       \[\leadsto -4 \cdot e^{\color{blue}{1 \cdot \left(\log \left(b \cdot a\right) \cdot 2 - \log \left(x-scale \cdot y-scale\right) \cdot 2\right)}} \]

    2. exp-prod 26.3%

       \[\leadsto -4 \cdot \color{blue}{{\left(e^{1}\right)}^{\left(\log \left(b \cdot a\right) \cdot 2 - \log \left(x-scale \cdot y-scale\right) \cdot 2\right)}} \]

    3. distribute-rgt-out-- 26.3%

       \[\leadsto -4 \cdot {\left(e^{1}\right)}^{\color{blue}{\left(2 \cdot \left(\log \left(b \cdot a\right) - \log \left(x-scale \cdot y-scale\right)\right)\right)}} \]

    4. diff-log 60.8%

       \[\leadsto -4 \cdot {\left(e^{1}\right)}^{\left(2 \cdot \color{blue}{\log \left(\frac{b \cdot a}{x-scale \cdot y-scale}\right)}\right)} \]

11. Applied egg-rr 60.8%

    \[\leadsto -4 \cdot \color{blue}{{\left(e^{1}\right)}^{\left(2 \cdot \log \left(\frac{b \cdot a}{x-scale \cdot y-scale}\right)\right)}} \]
12. Step-by-step derivation

    1. exp-prod 60.9%

       \[\leadsto -4 \cdot \color{blue}{e^{1 \cdot \left(2 \cdot \log \left(\frac{b \cdot a}{x-scale \cdot y-scale}\right)\right)}} \]

    2. *-lft-identity 60.9%

       \[\leadsto -4 \cdot e^{\color{blue}{2 \cdot \log \left(\frac{b \cdot a}{x-scale \cdot y-scale}\right)}} \]

    3. *-commutative 60.9%

       \[\leadsto -4 \cdot e^{\color{blue}{\log \left(\frac{b \cdot a}{x-scale \cdot y-scale}\right) \cdot 2}} \]

    4. exp-to-pow 94.4%

       \[\leadsto -4 \cdot \color{blue}{{\left(\frac{b \cdot a}{x-scale \cdot y-scale}\right)}^{2}} \]

    5. *-commutative 94.4%

       \[\leadsto -4 \cdot {\left(\frac{\color{blue}{a \cdot b}}{x-scale \cdot y-scale}\right)}^{2} \]

    6. times-frac 95.9%

       \[\leadsto -4 \cdot {\color{blue}{\left(\frac{a}{x-scale} \cdot \frac{b}{y-scale}\right)}}^{2} \]

13. Simplified 95.9%

    \[\leadsto -4 \cdot \color{blue}{{\left(\frac{a}{x-scale} \cdot \frac{b}{y-scale}\right)}^{2}} \]
14. Step-by-step derivation

    1. clear-num 95.9%

       \[\leadsto -4 \cdot {\left(\color{blue}{\frac{1}{\frac{x-scale}{a}}} \cdot \frac{b}{y-scale}\right)}^{2} \]

    2. frac-times 96.7%

       \[\leadsto -4 \cdot {\color{blue}{\left(\frac{1 \cdot b}{\frac{x-scale}{a} \cdot y-scale}\right)}}^{2} \]

    3. *-un-lft-identity 96.7%

       \[\leadsto -4 \cdot {\left(\frac{\color{blue}{b}}{\frac{x-scale}{a} \cdot y-scale}\right)}^{2} \]

15. Applied egg-rr 96.7%

    \[\leadsto -4 \cdot {\color{blue}{\left(\frac{b}{\frac{x-scale}{a} \cdot y-scale}\right)}}^{2} \]
16. Add Preprocessing

Alternative 2: 92.4% accurate, 14.7× speedup

Math

\[\begin{array}{l} \\ \begin{array}{l} \mathbf{if}\;a \leq 9 \cdot 10^{-171}:\\ \;\;\;\;-4 \cdot \left(\frac{b}{y-scale} \cdot \left(\frac{a}{x-scale} \cdot \frac{\frac{b}{y-scale}}{\frac{x-scale}{a}}\right)\right)\\ \mathbf{else}:\\ \;\;\;\;-4 \cdot {\left(a \cdot \frac{b}{x-scale \cdot y-scale}\right)}^{2}\\ \end{array} \end{array} \]

FPCore

(FPCore (a b angle x-scale y-scale)
 :precision binary64
 (if (<= a 9e-171)
   (* -4.0 (* (/ b y-scale) (* (/ a x-scale) (/ (/ b y-scale) (/ x-scale a)))))
   (* -4.0 (pow (* a (/ b (* x-scale y-scale))) 2.0))))

C

double code(double a, double b, double angle, double x_45_scale, double y_45_scale) {
	double tmp;
	if (a <= 9e-171) {
		tmp = -4.0 * ((b / y_45_scale) * ((a / x_45_scale) * ((b / y_45_scale) / (x_45_scale / a))));
	} else {
		tmp = -4.0 * pow((a * (b / (x_45_scale * y_45_scale))), 2.0);
	}
	return tmp;
}

Fortran

real(8) function code(a, b, angle, x_45scale, y_45scale)
    real(8), intent (in) :: a
    real(8), intent (in) :: b
    real(8), intent (in) :: angle
    real(8), intent (in) :: x_45scale
    real(8), intent (in) :: y_45scale
    real(8) :: tmp
    if (a <= 9d-171) then
        tmp = (-4.0d0) * ((b / y_45scale) * ((a / x_45scale) * ((b / y_45scale) / (x_45scale / a))))
    else
        tmp = (-4.0d0) * ((a * (b / (x_45scale * y_45scale))) ** 2.0d0)
    end if
    code = tmp
end function

Java

public static double code(double a, double b, double angle, double x_45_scale, double y_45_scale) {
	double tmp;
	if (a <= 9e-171) {
		tmp = -4.0 * ((b / y_45_scale) * ((a / x_45_scale) * ((b / y_45_scale) / (x_45_scale / a))));
	} else {
		tmp = -4.0 * Math.pow((a * (b / (x_45_scale * y_45_scale))), 2.0);
	}
	return tmp;
}

Python

def code(a, b, angle, x_45_scale, y_45_scale):
	tmp = 0
	if a <= 9e-171:
		tmp = -4.0 * ((b / y_45_scale) * ((a / x_45_scale) * ((b / y_45_scale) / (x_45_scale / a))))
	else:
		tmp = -4.0 * math.pow((a * (b / (x_45_scale * y_45_scale))), 2.0)
	return tmp

Julia

function code(a, b, angle, x_45_scale, y_45_scale)
	tmp = 0.0
	if (a <= 9e-171)
		tmp = Float64(-4.0 * Float64(Float64(b / y_45_scale) * Float64(Float64(a / x_45_scale) * Float64(Float64(b / y_45_scale) / Float64(x_45_scale / a)))));
	else
		tmp = Float64(-4.0 * (Float64(a * Float64(b / Float64(x_45_scale * y_45_scale))) ^ 2.0));
	end
	return tmp
end

MATLAB

function tmp_2 = code(a, b, angle, x_45_scale, y_45_scale)
	tmp = 0.0;
	if (a <= 9e-171)
		tmp = -4.0 * ((b / y_45_scale) * ((a / x_45_scale) * ((b / y_45_scale) / (x_45_scale / a))));
	else
		tmp = -4.0 * ((a * (b / (x_45_scale * y_45_scale))) ^ 2.0);
	end
	tmp_2 = tmp;
end

Wolfram

code[a_, b_, angle_, x$45$scale_, y$45$scale_] := If[LessEqual[a, 9e-171], N[(-4.0 * N[(N[(b / y$45$scale), $MachinePrecision] * N[(N[(a / x$45$scale), $MachinePrecision] * N[(N[(b / y$45$scale), $MachinePrecision] / N[(x$45$scale / a), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision], N[(-4.0 * N[Power[N[(a * N[(b / N[(x$45$scale * y$45$scale), $MachinePrecision]), $MachinePrecision]), $MachinePrecision], 2.0], $MachinePrecision]), $MachinePrecision]]

Derivation

1. Split input into 2 regimes

2. if a < 9.0000000000000008e-171

   1. Initial program 28.3%

      \[\frac{\frac{\left(\left(2 \cdot \left({b}^{2} - {a}^{2}\right)\right) \cdot \sin \left(\frac{angle}{180} \cdot \pi\right)\right) \cdot \cos \left(\frac{angle}{180} \cdot \pi\right)}{x-scale}}{y-scale} \cdot \frac{\frac{\left(\left(2 \cdot \left({b}^{2} - {a}^{2}\right)\right) \cdot \sin \left(\frac{angle}{180} \cdot \pi\right)\right) \cdot \cos \left(\frac{angle}{180} \cdot \pi\right)}{x-scale}}{y-scale} - \left(4 \cdot \frac{\frac{{\left(a \cdot \sin \left(\frac{angle}{180} \cdot \pi\right)\right)}^{2} + {\left(b \cdot \cos \left(\frac{angle}{180} \cdot \pi\right)\right)}^{2}}{x-scale}}{x-scale}\right) \cdot \frac{\frac{{\left(a \cdot \cos \left(\frac{angle}{180} \cdot \pi\right)\right)}^{2} + {\left(b \cdot \sin \left(\frac{angle}{180} \cdot \pi\right)\right)}^{2}}{y-scale}}{y-scale} \]

   3. Simplified 22.3%

      \[\leadsto \color{blue}{\frac{\left(2 \cdot \left({b}^{2} - {a}^{2}\right)\right) \cdot \left(\sin \left(\frac{angle}{180} \cdot \pi\right) \cdot \cos \left(\frac{angle}{180} \cdot \pi\right)\right)}{y-scale \cdot x-scale} \cdot \frac{\left(2 \cdot \left({b}^{2} - {a}^{2}\right)\right) \cdot \left(\sin \left(\frac{angle}{180} \cdot \pi\right) \cdot \cos \left(\frac{angle}{180} \cdot \pi\right)\right)}{y-scale \cdot x-scale} - 4 \cdot \left(\frac{{\left(a \cdot \sin \left(\frac{angle}{180} \cdot \pi\right)\right)}^{2} + {\left(b \cdot \cos \left(\frac{angle}{180} \cdot \pi\right)\right)}^{2}}{{x-scale}^{2}} \cdot \frac{{\left(a \cdot \cos \left(\frac{angle}{180} \cdot \pi\right)\right)}^{2} + {\left(b \cdot \sin \left(\frac{angle}{180} \cdot \pi\right)\right)}^{2}}{{y-scale}^{2}}\right)} \]
   4. Add Preprocessing

   5. Taylor expanded in angle around 0 53.9%

      \[\leadsto \color{blue}{-4 \cdot \frac{{a}^{2} \cdot {b}^{2}}{{x-scale}^{2} \cdot {y-scale}^{2}}} \]
   6. Step-by-step derivation

      1. *-commutative 53.9%

         \[\leadsto -4 \cdot \frac{\color{blue}{{b}^{2} \cdot {a}^{2}}}{{x-scale}^{2} \cdot {y-scale}^{2}} \]

      2. unpow2 53.9%

         \[\leadsto -4 \cdot \frac{\color{blue}{\left(b \cdot b\right)} \cdot {a}^{2}}{{x-scale}^{2} \cdot {y-scale}^{2}} \]

      3. unpow2 53.9%

         \[\leadsto -4 \cdot \frac{\left(b \cdot b\right) \cdot \color{blue}{\left(a \cdot a\right)}}{{x-scale}^{2} \cdot {y-scale}^{2}} \]

      4. swap-sqr 65.7%

         \[\leadsto -4 \cdot \frac{\color{blue}{\left(b \cdot a\right) \cdot \left(b \cdot a\right)}}{{x-scale}^{2} \cdot {y-scale}^{2}} \]

      5. unpow2 65.7%

         \[\leadsto -4 \cdot \frac{\color{blue}{{\left(b \cdot a\right)}^{2}}}{{x-scale}^{2} \cdot {y-scale}^{2}} \]

      6. unpow2 65.7%

         \[\leadsto -4 \cdot \frac{{\left(b \cdot a\right)}^{2}}{\color{blue}{\left(x-scale \cdot x-scale\right)} \cdot {y-scale}^{2}} \]

      7. unpow2 65.7%

         \[\leadsto -4 \cdot \frac{{\left(b \cdot a\right)}^{2}}{\left(x-scale \cdot x-scale\right) \cdot \color{blue}{\left(y-scale \cdot y-scale\right)}} \]

      8. swap-sqr 79.2%

         \[\leadsto -4 \cdot \frac{{\left(b \cdot a\right)}^{2}}{\color{blue}{\left(x-scale \cdot y-scale\right) \cdot \left(x-scale \cdot y-scale\right)}} \]

      9. unpow2 79.2%

         \[\leadsto -4 \cdot \frac{{\left(b \cdot a\right)}^{2}}{\color{blue}{{\left(x-scale \cdot y-scale\right)}^{2}}} \]

   7. Simplified 79.2%

      \[\leadsto \color{blue}{-4 \cdot \frac{{\left(b \cdot a\right)}^{2}}{{\left(x-scale \cdot y-scale\right)}^{2}}} \]
   8. Step-by-step derivation

      1. pow-to-exp 42.3%

         \[\leadsto -4 \cdot \frac{\color{blue}{e^{\log \left(b \cdot a\right) \cdot 2}}}{{\left(x-scale \cdot y-scale\right)}^{2}} \]

      2. pow-to-exp 26.3%

         \[\leadsto -4 \cdot \frac{e^{\log \left(b \cdot a\right) \cdot 2}}{\color{blue}{e^{\log \left(x-scale \cdot y-scale\right) \cdot 2}}} \]

      3. div-exp 29.1%

         \[\leadsto -4 \cdot \color{blue}{e^{\log \left(b \cdot a\right) \cdot 2 - \log \left(x-scale \cdot y-scale\right) \cdot 2}} \]

   9. Applied egg-rr 29.1%

      \[\leadsto -4 \cdot \color{blue}{e^{\log \left(b \cdot a\right) \cdot 2 - \log \left(x-scale \cdot y-scale\right) \cdot 2}} \]
   10. Step-by-step derivation

       1. *-un-lft-identity 29.1%

          \[\leadsto -4 \cdot e^{\color{blue}{1 \cdot \left(\log \left(b \cdot a\right) \cdot 2 - \log \left(x-scale \cdot y-scale\right) \cdot 2\right)}} \]

       2. exp-prod 29.1%

          \[\leadsto -4 \cdot \color{blue}{{\left(e^{1}\right)}^{\left(\log \left(b \cdot a\right) \cdot 2 - \log \left(x-scale \cdot y-scale\right) \cdot 2\right)}} \]

       3. distribute-rgt-out-- 29.1%

          \[\leadsto -4 \cdot {\left(e^{1}\right)}^{\color{blue}{\left(2 \cdot \left(\log \left(b \cdot a\right) - \log \left(x-scale \cdot y-scale\right)\right)\right)}} \]

       4. diff-log 66.9%

          \[\leadsto -4 \cdot {\left(e^{1}\right)}^{\left(2 \cdot \color{blue}{\log \left(\frac{b \cdot a}{x-scale \cdot y-scale}\right)}\right)} \]

   11. Applied egg-rr 66.9%

       \[\leadsto -4 \cdot \color{blue}{{\left(e^{1}\right)}^{\left(2 \cdot \log \left(\frac{b \cdot a}{x-scale \cdot y-scale}\right)\right)}} \]
   12. Step-by-step derivation

       1. exp-prod 67.1%

          \[\leadsto -4 \cdot \color{blue}{e^{1 \cdot \left(2 \cdot \log \left(\frac{b \cdot a}{x-scale \cdot y-scale}\right)\right)}} \]

       2. *-lft-identity 67.1%

          \[\leadsto -4 \cdot e^{\color{blue}{2 \cdot \log \left(\frac{b \cdot a}{x-scale \cdot y-scale}\right)}} \]

       3. *-commutative 67.1%

          \[\leadsto -4 \cdot e^{\color{blue}{\log \left(\frac{b \cdot a}{x-scale \cdot y-scale}\right) \cdot 2}} \]

       4. exp-to-pow 95.3%

          \[\leadsto -4 \cdot \color{blue}{{\left(\frac{b \cdot a}{x-scale \cdot y-scale}\right)}^{2}} \]

       5. *-commutative 95.3%

          \[\leadsto -4 \cdot {\left(\frac{\color{blue}{a \cdot b}}{x-scale \cdot y-scale}\right)}^{2} \]

       6. times-frac 95.4%

          \[\leadsto -4 \cdot {\color{blue}{\left(\frac{a}{x-scale} \cdot \frac{b}{y-scale}\right)}}^{2} \]

   13. Simplified 95.4%

       \[\leadsto -4 \cdot \color{blue}{{\left(\frac{a}{x-scale} \cdot \frac{b}{y-scale}\right)}^{2}} \]
   14. Step-by-step derivation

       1. unpow2 95.4%

          \[\leadsto -4 \cdot \color{blue}{\left(\left(\frac{a}{x-scale} \cdot \frac{b}{y-scale}\right) \cdot \left(\frac{a}{x-scale} \cdot \frac{b}{y-scale}\right)\right)} \]

       2. frac-times 91.2%

          \[\leadsto -4 \cdot \left(\color{blue}{\frac{a \cdot b}{x-scale \cdot y-scale}} \cdot \left(\frac{a}{x-scale} \cdot \frac{b}{y-scale}\right)\right) \]

       3. *-commutative 91.2%

          \[\leadsto -4 \cdot \left(\frac{\color{blue}{b \cdot a}}{x-scale \cdot y-scale} \cdot \left(\frac{a}{x-scale} \cdot \frac{b}{y-scale}\right)\right) \]

       4. associate-*r/ 91.7%

          \[\leadsto -4 \cdot \left(\color{blue}{\left(b \cdot \frac{a}{x-scale \cdot y-scale}\right)} \cdot \left(\frac{a}{x-scale} \cdot \frac{b}{y-scale}\right)\right) \]

       5. associate-*r* 90.1%

          \[\leadsto -4 \cdot \color{blue}{\left(\left(\left(b \cdot \frac{a}{x-scale \cdot y-scale}\right) \cdot \frac{a}{x-scale}\right) \cdot \frac{b}{y-scale}\right)} \]

       6. associate-*r/ 90.7%

          \[\leadsto -4 \cdot \left(\left(\color{blue}{\frac{b \cdot a}{x-scale \cdot y-scale}} \cdot \frac{a}{x-scale}\right) \cdot \frac{b}{y-scale}\right) \]

       7. *-commutative 90.7%

          \[\leadsto -4 \cdot \left(\left(\frac{b \cdot a}{\color{blue}{y-scale \cdot x-scale}} \cdot \frac{a}{x-scale}\right) \cdot \frac{b}{y-scale}\right) \]

       8. frac-times 93.8%

          \[\leadsto -4 \cdot \left(\left(\color{blue}{\left(\frac{b}{y-scale} \cdot \frac{a}{x-scale}\right)} \cdot \frac{a}{x-scale}\right) \cdot \frac{b}{y-scale}\right) \]

       9. clear-num 93.8%

          \[\leadsto -4 \cdot \left(\left(\left(\frac{b}{y-scale} \cdot \color{blue}{\frac{1}{\frac{x-scale}{a}}}\right) \cdot \frac{a}{x-scale}\right) \cdot \frac{b}{y-scale}\right) \]

       10. un-div-inv 93.8%

           \[\leadsto -4 \cdot \left(\left(\color{blue}{\frac{\frac{b}{y-scale}}{\frac{x-scale}{a}}} \cdot \frac{a}{x-scale}\right) \cdot \frac{b}{y-scale}\right) \]

   15. Applied egg-rr 93.8%

       \[\leadsto -4 \cdot \color{blue}{\left(\left(\frac{\frac{b}{y-scale}}{\frac{x-scale}{a}} \cdot \frac{a}{x-scale}\right) \cdot \frac{b}{y-scale}\right)} \]

   if 9.0000000000000008e-171 < a

   1. Initial program 24.5%

      \[\frac{\frac{\left(\left(2 \cdot \left({b}^{2} - {a}^{2}\right)\right) \cdot \sin \left(\frac{angle}{180} \cdot \pi\right)\right) \cdot \cos \left(\frac{angle}{180} \cdot \pi\right)}{x-scale}}{y-scale} \cdot \frac{\frac{\left(\left(2 \cdot \left({b}^{2} - {a}^{2}\right)\right) \cdot \sin \left(\frac{angle}{180} \cdot \pi\right)\right) \cdot \cos \left(\frac{angle}{180} \cdot \pi\right)}{x-scale}}{y-scale} - \left(4 \cdot \frac{\frac{{\left(a \cdot \sin \left(\frac{angle}{180} \cdot \pi\right)\right)}^{2} + {\left(b \cdot \cos \left(\frac{angle}{180} \cdot \pi\right)\right)}^{2}}{x-scale}}{x-scale}\right) \cdot \frac{\frac{{\left(a \cdot \cos \left(\frac{angle}{180} \cdot \pi\right)\right)}^{2} + {\left(b \cdot \sin \left(\frac{angle}{180} \cdot \pi\right)\right)}^{2}}{y-scale}}{y-scale} \]

   3. Simplified 23.2%

      \[\leadsto \color{blue}{\frac{\left(2 \cdot \left({b}^{2} - {a}^{2}\right)\right) \cdot \left(\sin \left(\frac{angle}{180} \cdot \pi\right) \cdot \cos \left(\frac{angle}{180} \cdot \pi\right)\right)}{y-scale \cdot x-scale} \cdot \frac{\left(2 \cdot \left({b}^{2} - {a}^{2}\right)\right) \cdot \left(\sin \left(\frac{angle}{180} \cdot \pi\right) \cdot \cos \left(\frac{angle}{180} \cdot \pi\right)\right)}{y-scale \cdot x-scale} - 4 \cdot \left(\frac{{\left(a \cdot \sin \left(\frac{angle}{180} \cdot \pi\right)\right)}^{2} + {\left(b \cdot \cos \left(\frac{angle}{180} \cdot \pi\right)\right)}^{2}}{{x-scale}^{2}} \cdot \frac{{\left(a \cdot \cos \left(\frac{angle}{180} \cdot \pi\right)\right)}^{2} + {\left(b \cdot \sin \left(\frac{angle}{180} \cdot \pi\right)\right)}^{2}}{{y-scale}^{2}}\right)} \]
   4. Add Preprocessing

   5. Taylor expanded in angle around 0 51.9%

      \[\leadsto \color{blue}{-4 \cdot \frac{{a}^{2} \cdot {b}^{2}}{{x-scale}^{2} \cdot {y-scale}^{2}}} \]
   6. Step-by-step derivation

      1. *-commutative 51.9%

         \[\leadsto -4 \cdot \frac{\color{blue}{{b}^{2} \cdot {a}^{2}}}{{x-scale}^{2} \cdot {y-scale}^{2}} \]

      2. unpow2 51.9%

         \[\leadsto -4 \cdot \frac{\color{blue}{\left(b \cdot b\right)} \cdot {a}^{2}}{{x-scale}^{2} \cdot {y-scale}^{2}} \]

      3. unpow2 51.9%

         \[\leadsto -4 \cdot \frac{\left(b \cdot b\right) \cdot \color{blue}{\left(a \cdot a\right)}}{{x-scale}^{2} \cdot {y-scale}^{2}} \]

      4. swap-sqr 63.5%

         \[\leadsto -4 \cdot \frac{\color{blue}{\left(b \cdot a\right) \cdot \left(b \cdot a\right)}}{{x-scale}^{2} \cdot {y-scale}^{2}} \]

      5. unpow2 63.5%

         \[\leadsto -4 \cdot \frac{\color{blue}{{\left(b \cdot a\right)}^{2}}}{{x-scale}^{2} \cdot {y-scale}^{2}} \]

      6. unpow2 63.5%

         \[\leadsto -4 \cdot \frac{{\left(b \cdot a\right)}^{2}}{\color{blue}{\left(x-scale \cdot x-scale\right)} \cdot {y-scale}^{2}} \]

      7. unpow2 63.5%

         \[\leadsto -4 \cdot \frac{{\left(b \cdot a\right)}^{2}}{\left(x-scale \cdot x-scale\right) \cdot \color{blue}{\left(y-scale \cdot y-scale\right)}} \]

      8. swap-sqr 74.5%

         \[\leadsto -4 \cdot \frac{{\left(b \cdot a\right)}^{2}}{\color{blue}{\left(x-scale \cdot y-scale\right) \cdot \left(x-scale \cdot y-scale\right)}} \]

      9. unpow2 74.5%

         \[\leadsto -4 \cdot \frac{{\left(b \cdot a\right)}^{2}}{\color{blue}{{\left(x-scale \cdot y-scale\right)}^{2}}} \]

   7. Simplified 74.5%

      \[\leadsto \color{blue}{-4 \cdot \frac{{\left(b \cdot a\right)}^{2}}{{\left(x-scale \cdot y-scale\right)}^{2}}} \]
   8. Step-by-step derivation

      1. pow-to-exp 35.2%

         \[\leadsto -4 \cdot \frac{\color{blue}{e^{\log \left(b \cdot a\right) \cdot 2}}}{{\left(x-scale \cdot y-scale\right)}^{2}} \]

      2. pow-to-exp 19.2%

         \[\leadsto -4 \cdot \frac{e^{\log \left(b \cdot a\right) \cdot 2}}{\color{blue}{e^{\log \left(x-scale \cdot y-scale\right) \cdot 2}}} \]

      3. div-exp 22.1%

         \[\leadsto -4 \cdot \color{blue}{e^{\log \left(b \cdot a\right) \cdot 2 - \log \left(x-scale \cdot y-scale\right) \cdot 2}} \]

   9. Applied egg-rr 22.1%

      \[\leadsto -4 \cdot \color{blue}{e^{\log \left(b \cdot a\right) \cdot 2 - \log \left(x-scale \cdot y-scale\right) \cdot 2}} \]
   10. Step-by-step derivation

       1. *-un-lft-identity 22.1%

          \[\leadsto -4 \cdot e^{\color{blue}{1 \cdot \left(\log \left(b \cdot a\right) \cdot 2 - \log \left(x-scale \cdot y-scale\right) \cdot 2\right)}} \]

       2. exp-prod 22.1%

          \[\leadsto -4 \cdot \color{blue}{{\left(e^{1}\right)}^{\left(\log \left(b \cdot a\right) \cdot 2 - \log \left(x-scale \cdot y-scale\right) \cdot 2\right)}} \]

       3. distribute-rgt-out-- 22.1%

          \[\leadsto -4 \cdot {\left(e^{1}\right)}^{\color{blue}{\left(2 \cdot \left(\log \left(b \cdot a\right) - \log \left(x-scale \cdot y-scale\right)\right)\right)}} \]

       4. diff-log 51.4%

          \[\leadsto -4 \cdot {\left(e^{1}\right)}^{\left(2 \cdot \color{blue}{\log \left(\frac{b \cdot a}{x-scale \cdot y-scale}\right)}\right)} \]

   11. Applied egg-rr 51.4%

       \[\leadsto -4 \cdot \color{blue}{{\left(e^{1}\right)}^{\left(2 \cdot \log \left(\frac{b \cdot a}{x-scale \cdot y-scale}\right)\right)}} \]
   12. Step-by-step derivation

       1. exp-prod 51.4%

          \[\leadsto -4 \cdot \color{blue}{e^{1 \cdot \left(2 \cdot \log \left(\frac{b \cdot a}{x-scale \cdot y-scale}\right)\right)}} \]

       2. *-lft-identity 51.4%

          \[\leadsto -4 \cdot e^{\color{blue}{2 \cdot \log \left(\frac{b \cdot a}{x-scale \cdot y-scale}\right)}} \]

       3. *-commutative 51.4%

          \[\leadsto -4 \cdot e^{\color{blue}{\log \left(\frac{b \cdot a}{x-scale \cdot y-scale}\right) \cdot 2}} \]

       4. exp-to-pow 93.0%

          \[\leadsto -4 \cdot \color{blue}{{\left(\frac{b \cdot a}{x-scale \cdot y-scale}\right)}^{2}} \]

       5. *-commutative 93.0%

          \[\leadsto -4 \cdot {\left(\frac{\color{blue}{a \cdot b}}{x-scale \cdot y-scale}\right)}^{2} \]

       6. times-frac 96.8%

          \[\leadsto -4 \cdot {\color{blue}{\left(\frac{a}{x-scale} \cdot \frac{b}{y-scale}\right)}}^{2} \]

   13. Simplified 96.8%

       \[\leadsto -4 \cdot \color{blue}{{\left(\frac{a}{x-scale} \cdot \frac{b}{y-scale}\right)}^{2}} \]

   14. Taylor expanded in a around 0 93.0%

       \[\leadsto -4 \cdot {\color{blue}{\left(\frac{a \cdot b}{x-scale \cdot y-scale}\right)}}^{2} \]
   15. Step-by-step derivation

       1. associate-/l* 94.9%

          \[\leadsto -4 \cdot {\color{blue}{\left(a \cdot \frac{b}{x-scale \cdot y-scale}\right)}}^{2} \]

   16. Simplified 94.9%

       \[\leadsto -4 \cdot {\color{blue}{\left(a \cdot \frac{b}{x-scale \cdot y-scale}\right)}}^{2} \]
3. Recombined 2 regimes into one program.

4. Final simplification 94.2%

   \[\leadsto \begin{array}{l} \mathbf{if}\;a \leq 9 \cdot 10^{-171}:\\ \;\;\;\;-4 \cdot \left(\frac{b}{y-scale} \cdot \left(\frac{a}{x-scale} \cdot \frac{\frac{b}{y-scale}}{\frac{x-scale}{a}}\right)\right)\\ \mathbf{else}:\\ \;\;\;\;-4 \cdot {\left(a \cdot \frac{b}{x-scale \cdot y-scale}\right)}^{2}\\ \end{array} \]
5. Add Preprocessing

Alternative 3: 93.4% accurate, 15.4× speedup

Math

\[\begin{array}{l} \\ -4 \cdot {\left(\frac{a}{x-scale} \cdot \frac{b}{y-scale}\right)}^{2} \end{array} \]

FPCore

(FPCore (a b angle x-scale y-scale)
 :precision binary64
 (* -4.0 (pow (* (/ a x-scale) (/ b y-scale)) 2.0)))

C

double code(double a, double b, double angle, double x_45_scale, double y_45_scale) {
	return -4.0 * pow(((a / x_45_scale) * (b / y_45_scale)), 2.0);
}

Fortran

real(8) function code(a, b, angle, x_45scale, y_45scale)
    real(8), intent (in) :: a
    real(8), intent (in) :: b
    real(8), intent (in) :: angle
    real(8), intent (in) :: x_45scale
    real(8), intent (in) :: y_45scale
    code = (-4.0d0) * (((a / x_45scale) * (b / y_45scale)) ** 2.0d0)
end function

Java

public static double code(double a, double b, double angle, double x_45_scale, double y_45_scale) {
	return -4.0 * Math.pow(((a / x_45_scale) * (b / y_45_scale)), 2.0);
}

Python

def code(a, b, angle, x_45_scale, y_45_scale):
	return -4.0 * math.pow(((a / x_45_scale) * (b / y_45_scale)), 2.0)

Julia

function code(a, b, angle, x_45_scale, y_45_scale)
	return Float64(-4.0 * (Float64(Float64(a / x_45_scale) * Float64(b / y_45_scale)) ^ 2.0))
end

MATLAB

function tmp = code(a, b, angle, x_45_scale, y_45_scale)
	tmp = -4.0 * (((a / x_45_scale) * (b / y_45_scale)) ^ 2.0);
end

Wolfram

code[a_, b_, angle_, x$45$scale_, y$45$scale_] := N[(-4.0 * N[Power[N[(N[(a / x$45$scale), $MachinePrecision] * N[(b / y$45$scale), $MachinePrecision]), $MachinePrecision], 2.0], $MachinePrecision]), $MachinePrecision]

Derivation

1. Initial program 26.8%

   \[\frac{\frac{\left(\left(2 \cdot \left({b}^{2} - {a}^{2}\right)\right) \cdot \sin \left(\frac{angle}{180} \cdot \pi\right)\right) \cdot \cos \left(\frac{angle}{180} \cdot \pi\right)}{x-scale}}{y-scale} \cdot \frac{\frac{\left(\left(2 \cdot \left({b}^{2} - {a}^{2}\right)\right) \cdot \sin \left(\frac{angle}{180} \cdot \pi\right)\right) \cdot \cos \left(\frac{angle}{180} \cdot \pi\right)}{x-scale}}{y-scale} - \left(4 \cdot \frac{\frac{{\left(a \cdot \sin \left(\frac{angle}{180} \cdot \pi\right)\right)}^{2} + {\left(b \cdot \cos \left(\frac{angle}{180} \cdot \pi\right)\right)}^{2}}{x-scale}}{x-scale}\right) \cdot \frac{\frac{{\left(a \cdot \cos \left(\frac{angle}{180} \cdot \pi\right)\right)}^{2} + {\left(b \cdot \sin \left(\frac{angle}{180} \cdot \pi\right)\right)}^{2}}{y-scale}}{y-scale} \]

3. Simplified 22.6%

   \[\leadsto \color{blue}{\frac{\left(2 \cdot \left({b}^{2} - {a}^{2}\right)\right) \cdot \left(\sin \left(\frac{angle}{180} \cdot \pi\right) \cdot \cos \left(\frac{angle}{180} \cdot \pi\right)\right)}{y-scale \cdot x-scale} \cdot \frac{\left(2 \cdot \left({b}^{2} - {a}^{2}\right)\right) \cdot \left(\sin \left(\frac{angle}{180} \cdot \pi\right) \cdot \cos \left(\frac{angle}{180} \cdot \pi\right)\right)}{y-scale \cdot x-scale} - 4 \cdot \left(\frac{{\left(a \cdot \sin \left(\frac{angle}{180} \cdot \pi\right)\right)}^{2} + {\left(b \cdot \cos \left(\frac{angle}{180} \cdot \pi\right)\right)}^{2}}{{x-scale}^{2}} \cdot \frac{{\left(a \cdot \cos \left(\frac{angle}{180} \cdot \pi\right)\right)}^{2} + {\left(b \cdot \sin \left(\frac{angle}{180} \cdot \pi\right)\right)}^{2}}{{y-scale}^{2}}\right)} \]
4. Add Preprocessing

5. Taylor expanded in angle around 0 53.1%

   \[\leadsto \color{blue}{-4 \cdot \frac{{a}^{2} \cdot {b}^{2}}{{x-scale}^{2} \cdot {y-scale}^{2}}} \]
6. Step-by-step derivation

   1. *-commutative 53.1%

      \[\leadsto -4 \cdot \frac{\color{blue}{{b}^{2} \cdot {a}^{2}}}{{x-scale}^{2} \cdot {y-scale}^{2}} \]

   2. unpow2 53.1%

      \[\leadsto -4 \cdot \frac{\color{blue}{\left(b \cdot b\right)} \cdot {a}^{2}}{{x-scale}^{2} \cdot {y-scale}^{2}} \]

   3. unpow2 53.1%

      \[\leadsto -4 \cdot \frac{\left(b \cdot b\right) \cdot \color{blue}{\left(a \cdot a\right)}}{{x-scale}^{2} \cdot {y-scale}^{2}} \]

   4. swap-sqr 64.8%

      \[\leadsto -4 \cdot \frac{\color{blue}{\left(b \cdot a\right) \cdot \left(b \cdot a\right)}}{{x-scale}^{2} \cdot {y-scale}^{2}} \]

   5. unpow2 64.8%

      \[\leadsto -4 \cdot \frac{\color{blue}{{\left(b \cdot a\right)}^{2}}}{{x-scale}^{2} \cdot {y-scale}^{2}} \]

   6. unpow2 64.8%

      \[\leadsto -4 \cdot \frac{{\left(b \cdot a\right)}^{2}}{\color{blue}{\left(x-scale \cdot x-scale\right)} \cdot {y-scale}^{2}} \]

   7. unpow2 64.8%

      \[\leadsto -4 \cdot \frac{{\left(b \cdot a\right)}^{2}}{\left(x-scale \cdot x-scale\right) \cdot \color{blue}{\left(y-scale \cdot y-scale\right)}} \]

   8. swap-sqr 77.3%

      \[\leadsto -4 \cdot \frac{{\left(b \cdot a\right)}^{2}}{\color{blue}{\left(x-scale \cdot y-scale\right) \cdot \left(x-scale \cdot y-scale\right)}} \]

   9. unpow2 77.3%

      \[\leadsto -4 \cdot \frac{{\left(b \cdot a\right)}^{2}}{\color{blue}{{\left(x-scale \cdot y-scale\right)}^{2}}} \]

7. Simplified 77.3%

   \[\leadsto \color{blue}{-4 \cdot \frac{{\left(b \cdot a\right)}^{2}}{{\left(x-scale \cdot y-scale\right)}^{2}}} \]
8. Step-by-step derivation

   1. pow-to-exp 39.5%

      \[\leadsto -4 \cdot \frac{\color{blue}{e^{\log \left(b \cdot a\right) \cdot 2}}}{{\left(x-scale \cdot y-scale\right)}^{2}} \]

   2. pow-to-exp 23.5%

      \[\leadsto -4 \cdot \frac{e^{\log \left(b \cdot a\right) \cdot 2}}{\color{blue}{e^{\log \left(x-scale \cdot y-scale\right) \cdot 2}}} \]

   3. div-exp 26.3%

      \[\leadsto -4 \cdot \color{blue}{e^{\log \left(b \cdot a\right) \cdot 2 - \log \left(x-scale \cdot y-scale\right) \cdot 2}} \]

9. Applied egg-rr 26.3%

   \[\leadsto -4 \cdot \color{blue}{e^{\log \left(b \cdot a\right) \cdot 2 - \log \left(x-scale \cdot y-scale\right) \cdot 2}} \]
10. Step-by-step derivation

    1. *-un-lft-identity 26.3%

       \[\leadsto -4 \cdot e^{\color{blue}{1 \cdot \left(\log \left(b \cdot a\right) \cdot 2 - \log \left(x-scale \cdot y-scale\right) \cdot 2\right)}} \]

    2. exp-prod 26.3%

       \[\leadsto -4 \cdot \color{blue}{{\left(e^{1}\right)}^{\left(\log \left(b \cdot a\right) \cdot 2 - \log \left(x-scale \cdot y-scale\right) \cdot 2\right)}} \]

    3. distribute-rgt-out-- 26.3%

       \[\leadsto -4 \cdot {\left(e^{1}\right)}^{\color{blue}{\left(2 \cdot \left(\log \left(b \cdot a\right) - \log \left(x-scale \cdot y-scale\right)\right)\right)}} \]

    4. diff-log 60.8%

       \[\leadsto -4 \cdot {\left(e^{1}\right)}^{\left(2 \cdot \color{blue}{\log \left(\frac{b \cdot a}{x-scale \cdot y-scale}\right)}\right)} \]

11. Applied egg-rr 60.8%

    \[\leadsto -4 \cdot \color{blue}{{\left(e^{1}\right)}^{\left(2 \cdot \log \left(\frac{b \cdot a}{x-scale \cdot y-scale}\right)\right)}} \]
12. Step-by-step derivation

    1. exp-prod 60.9%

       \[\leadsto -4 \cdot \color{blue}{e^{1 \cdot \left(2 \cdot \log \left(\frac{b \cdot a}{x-scale \cdot y-scale}\right)\right)}} \]

    2. *-lft-identity 60.9%

       \[\leadsto -4 \cdot e^{\color{blue}{2 \cdot \log \left(\frac{b \cdot a}{x-scale \cdot y-scale}\right)}} \]

    3. *-commutative 60.9%

       \[\leadsto -4 \cdot e^{\color{blue}{\log \left(\frac{b \cdot a}{x-scale \cdot y-scale}\right) \cdot 2}} \]

    4. exp-to-pow 94.4%

       \[\leadsto -4 \cdot \color{blue}{{\left(\frac{b \cdot a}{x-scale \cdot y-scale}\right)}^{2}} \]

    5. *-commutative 94.4%

       \[\leadsto -4 \cdot {\left(\frac{\color{blue}{a \cdot b}}{x-scale \cdot y-scale}\right)}^{2} \]

    6. times-frac 95.9%

       \[\leadsto -4 \cdot {\color{blue}{\left(\frac{a}{x-scale} \cdot \frac{b}{y-scale}\right)}}^{2} \]

13. Simplified 95.9%

    \[\leadsto -4 \cdot \color{blue}{{\left(\frac{a}{x-scale} \cdot \frac{b}{y-scale}\right)}^{2}} \]
14. Add Preprocessing

Alternative 4: 90.8% accurate, 99.6× speedup

Math

\[\begin{array}{l} \\ -4 \cdot \left(\frac{b}{y-scale} \cdot \left(\frac{a}{x-scale} \cdot \frac{\frac{b}{y-scale}}{\frac{x-scale}{a}}\right)\right) \end{array} \]

FPCore

(FPCore (a b angle x-scale y-scale)
 :precision binary64
 (* -4.0 (* (/ b y-scale) (* (/ a x-scale) (/ (/ b y-scale) (/ x-scale a))))))

C

double code(double a, double b, double angle, double x_45_scale, double y_45_scale) {
	return -4.0 * ((b / y_45_scale) * ((a / x_45_scale) * ((b / y_45_scale) / (x_45_scale / a))));
}

Fortran

real(8) function code(a, b, angle, x_45scale, y_45scale)
    real(8), intent (in) :: a
    real(8), intent (in) :: b
    real(8), intent (in) :: angle
    real(8), intent (in) :: x_45scale
    real(8), intent (in) :: y_45scale
    code = (-4.0d0) * ((b / y_45scale) * ((a / x_45scale) * ((b / y_45scale) / (x_45scale / a))))
end function

Java

public static double code(double a, double b, double angle, double x_45_scale, double y_45_scale) {
	return -4.0 * ((b / y_45_scale) * ((a / x_45_scale) * ((b / y_45_scale) / (x_45_scale / a))));
}

Python

def code(a, b, angle, x_45_scale, y_45_scale):
	return -4.0 * ((b / y_45_scale) * ((a / x_45_scale) * ((b / y_45_scale) / (x_45_scale / a))))

Julia

function code(a, b, angle, x_45_scale, y_45_scale)
	return Float64(-4.0 * Float64(Float64(b / y_45_scale) * Float64(Float64(a / x_45_scale) * Float64(Float64(b / y_45_scale) / Float64(x_45_scale / a)))))
end

MATLAB

function tmp = code(a, b, angle, x_45_scale, y_45_scale)
	tmp = -4.0 * ((b / y_45_scale) * ((a / x_45_scale) * ((b / y_45_scale) / (x_45_scale / a))));
end

Wolfram

code[a_, b_, angle_, x$45$scale_, y$45$scale_] := N[(-4.0 * N[(N[(b / y$45$scale), $MachinePrecision] * N[(N[(a / x$45$scale), $MachinePrecision] * N[(N[(b / y$45$scale), $MachinePrecision] / N[(x$45$scale / a), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]

Derivation

1. Initial program 26.8%

   \[\frac{\frac{\left(\left(2 \cdot \left({b}^{2} - {a}^{2}\right)\right) \cdot \sin \left(\frac{angle}{180} \cdot \pi\right)\right) \cdot \cos \left(\frac{angle}{180} \cdot \pi\right)}{x-scale}}{y-scale} \cdot \frac{\frac{\left(\left(2 \cdot \left({b}^{2} - {a}^{2}\right)\right) \cdot \sin \left(\frac{angle}{180} \cdot \pi\right)\right) \cdot \cos \left(\frac{angle}{180} \cdot \pi\right)}{x-scale}}{y-scale} - \left(4 \cdot \frac{\frac{{\left(a \cdot \sin \left(\frac{angle}{180} \cdot \pi\right)\right)}^{2} + {\left(b \cdot \cos \left(\frac{angle}{180} \cdot \pi\right)\right)}^{2}}{x-scale}}{x-scale}\right) \cdot \frac{\frac{{\left(a \cdot \cos \left(\frac{angle}{180} \cdot \pi\right)\right)}^{2} + {\left(b \cdot \sin \left(\frac{angle}{180} \cdot \pi\right)\right)}^{2}}{y-scale}}{y-scale} \]

3. Simplified 22.6%

   \[\leadsto \color{blue}{\frac{\left(2 \cdot \left({b}^{2} - {a}^{2}\right)\right) \cdot \left(\sin \left(\frac{angle}{180} \cdot \pi\right) \cdot \cos \left(\frac{angle}{180} \cdot \pi\right)\right)}{y-scale \cdot x-scale} \cdot \frac{\left(2 \cdot \left({b}^{2} - {a}^{2}\right)\right) \cdot \left(\sin \left(\frac{angle}{180} \cdot \pi\right) \cdot \cos \left(\frac{angle}{180} \cdot \pi\right)\right)}{y-scale \cdot x-scale} - 4 \cdot \left(\frac{{\left(a \cdot \sin \left(\frac{angle}{180} \cdot \pi\right)\right)}^{2} + {\left(b \cdot \cos \left(\frac{angle}{180} \cdot \pi\right)\right)}^{2}}{{x-scale}^{2}} \cdot \frac{{\left(a \cdot \cos \left(\frac{angle}{180} \cdot \pi\right)\right)}^{2} + {\left(b \cdot \sin \left(\frac{angle}{180} \cdot \pi\right)\right)}^{2}}{{y-scale}^{2}}\right)} \]
4. Add Preprocessing

5. Taylor expanded in angle around 0 53.1%

   \[\leadsto \color{blue}{-4 \cdot \frac{{a}^{2} \cdot {b}^{2}}{{x-scale}^{2} \cdot {y-scale}^{2}}} \]
6. Step-by-step derivation

   1. *-commutative 53.1%

      \[\leadsto -4 \cdot \frac{\color{blue}{{b}^{2} \cdot {a}^{2}}}{{x-scale}^{2} \cdot {y-scale}^{2}} \]

   2. unpow2 53.1%

      \[\leadsto -4 \cdot \frac{\color{blue}{\left(b \cdot b\right)} \cdot {a}^{2}}{{x-scale}^{2} \cdot {y-scale}^{2}} \]

   3. unpow2 53.1%

      \[\leadsto -4 \cdot \frac{\left(b \cdot b\right) \cdot \color{blue}{\left(a \cdot a\right)}}{{x-scale}^{2} \cdot {y-scale}^{2}} \]

   4. swap-sqr 64.8%

      \[\leadsto -4 \cdot \frac{\color{blue}{\left(b \cdot a\right) \cdot \left(b \cdot a\right)}}{{x-scale}^{2} \cdot {y-scale}^{2}} \]

   5. unpow2 64.8%

      \[\leadsto -4 \cdot \frac{\color{blue}{{\left(b \cdot a\right)}^{2}}}{{x-scale}^{2} \cdot {y-scale}^{2}} \]

   6. unpow2 64.8%

      \[\leadsto -4 \cdot \frac{{\left(b \cdot a\right)}^{2}}{\color{blue}{\left(x-scale \cdot x-scale\right)} \cdot {y-scale}^{2}} \]

   7. unpow2 64.8%

      \[\leadsto -4 \cdot \frac{{\left(b \cdot a\right)}^{2}}{\left(x-scale \cdot x-scale\right) \cdot \color{blue}{\left(y-scale \cdot y-scale\right)}} \]

   8. swap-sqr 77.3%

      \[\leadsto -4 \cdot \frac{{\left(b \cdot a\right)}^{2}}{\color{blue}{\left(x-scale \cdot y-scale\right) \cdot \left(x-scale \cdot y-scale\right)}} \]

   9. unpow2 77.3%

      \[\leadsto -4 \cdot \frac{{\left(b \cdot a\right)}^{2}}{\color{blue}{{\left(x-scale \cdot y-scale\right)}^{2}}} \]

7. Simplified 77.3%

   \[\leadsto \color{blue}{-4 \cdot \frac{{\left(b \cdot a\right)}^{2}}{{\left(x-scale \cdot y-scale\right)}^{2}}} \]
8. Step-by-step derivation

   1. pow-to-exp 39.5%

      \[\leadsto -4 \cdot \frac{\color{blue}{e^{\log \left(b \cdot a\right) \cdot 2}}}{{\left(x-scale \cdot y-scale\right)}^{2}} \]

   2. pow-to-exp 23.5%

      \[\leadsto -4 \cdot \frac{e^{\log \left(b \cdot a\right) \cdot 2}}{\color{blue}{e^{\log \left(x-scale \cdot y-scale\right) \cdot 2}}} \]

   3. div-exp 26.3%

      \[\leadsto -4 \cdot \color{blue}{e^{\log \left(b \cdot a\right) \cdot 2 - \log \left(x-scale \cdot y-scale\right) \cdot 2}} \]

9. Applied egg-rr 26.3%

   \[\leadsto -4 \cdot \color{blue}{e^{\log \left(b \cdot a\right) \cdot 2 - \log \left(x-scale \cdot y-scale\right) \cdot 2}} \]
10. Step-by-step derivation

    1. *-un-lft-identity 26.3%

       \[\leadsto -4 \cdot e^{\color{blue}{1 \cdot \left(\log \left(b \cdot a\right) \cdot 2 - \log \left(x-scale \cdot y-scale\right) \cdot 2\right)}} \]

    2. exp-prod 26.3%

       \[\leadsto -4 \cdot \color{blue}{{\left(e^{1}\right)}^{\left(\log \left(b \cdot a\right) \cdot 2 - \log \left(x-scale \cdot y-scale\right) \cdot 2\right)}} \]

    3. distribute-rgt-out-- 26.3%

       \[\leadsto -4 \cdot {\left(e^{1}\right)}^{\color{blue}{\left(2 \cdot \left(\log \left(b \cdot a\right) - \log \left(x-scale \cdot y-scale\right)\right)\right)}} \]

    4. diff-log 60.8%

       \[\leadsto -4 \cdot {\left(e^{1}\right)}^{\left(2 \cdot \color{blue}{\log \left(\frac{b \cdot a}{x-scale \cdot y-scale}\right)}\right)} \]

11. Applied egg-rr 60.8%

    \[\leadsto -4 \cdot \color{blue}{{\left(e^{1}\right)}^{\left(2 \cdot \log \left(\frac{b \cdot a}{x-scale \cdot y-scale}\right)\right)}} \]
12. Step-by-step derivation

    1. exp-prod 60.9%

       \[\leadsto -4 \cdot \color{blue}{e^{1 \cdot \left(2 \cdot \log \left(\frac{b \cdot a}{x-scale \cdot y-scale}\right)\right)}} \]

    2. *-lft-identity 60.9%

       \[\leadsto -4 \cdot e^{\color{blue}{2 \cdot \log \left(\frac{b \cdot a}{x-scale \cdot y-scale}\right)}} \]

    3. *-commutative 60.9%

       \[\leadsto -4 \cdot e^{\color{blue}{\log \left(\frac{b \cdot a}{x-scale \cdot y-scale}\right) \cdot 2}} \]

    4. exp-to-pow 94.4%

       \[\leadsto -4 \cdot \color{blue}{{\left(\frac{b \cdot a}{x-scale \cdot y-scale}\right)}^{2}} \]

    5. *-commutative 94.4%

       \[\leadsto -4 \cdot {\left(\frac{\color{blue}{a \cdot b}}{x-scale \cdot y-scale}\right)}^{2} \]

    6. times-frac 95.9%

       \[\leadsto -4 \cdot {\color{blue}{\left(\frac{a}{x-scale} \cdot \frac{b}{y-scale}\right)}}^{2} \]

13. Simplified 95.9%

    \[\leadsto -4 \cdot \color{blue}{{\left(\frac{a}{x-scale} \cdot \frac{b}{y-scale}\right)}^{2}} \]
14. Step-by-step derivation

    1. unpow2 95.9%

       \[\leadsto -4 \cdot \color{blue}{\left(\left(\frac{a}{x-scale} \cdot \frac{b}{y-scale}\right) \cdot \left(\frac{a}{x-scale} \cdot \frac{b}{y-scale}\right)\right)} \]

    2. frac-times 91.2%

       \[\leadsto -4 \cdot \left(\color{blue}{\frac{a \cdot b}{x-scale \cdot y-scale}} \cdot \left(\frac{a}{x-scale} \cdot \frac{b}{y-scale}\right)\right) \]

    3. *-commutative 91.2%

       \[\leadsto -4 \cdot \left(\frac{\color{blue}{b \cdot a}}{x-scale \cdot y-scale} \cdot \left(\frac{a}{x-scale} \cdot \frac{b}{y-scale}\right)\right) \]

    4. associate-*r/ 92.7%

       \[\leadsto -4 \cdot \left(\color{blue}{\left(b \cdot \frac{a}{x-scale \cdot y-scale}\right)} \cdot \left(\frac{a}{x-scale} \cdot \frac{b}{y-scale}\right)\right) \]

    5. associate-*r* 90.8%

       \[\leadsto -4 \cdot \color{blue}{\left(\left(\left(b \cdot \frac{a}{x-scale \cdot y-scale}\right) \cdot \frac{a}{x-scale}\right) \cdot \frac{b}{y-scale}\right)} \]

    6. associate-*r/ 90.1%

       \[\leadsto -4 \cdot \left(\left(\color{blue}{\frac{b \cdot a}{x-scale \cdot y-scale}} \cdot \frac{a}{x-scale}\right) \cdot \frac{b}{y-scale}\right) \]

    7. *-commutative 90.1%

       \[\leadsto -4 \cdot \left(\left(\frac{b \cdot a}{\color{blue}{y-scale \cdot x-scale}} \cdot \frac{a}{x-scale}\right) \cdot \frac{b}{y-scale}\right) \]

    8. frac-times 94.1%

       \[\leadsto -4 \cdot \left(\left(\color{blue}{\left(\frac{b}{y-scale} \cdot \frac{a}{x-scale}\right)} \cdot \frac{a}{x-scale}\right) \cdot \frac{b}{y-scale}\right) \]

    9. clear-num 94.1%

       \[\leadsto -4 \cdot \left(\left(\left(\frac{b}{y-scale} \cdot \color{blue}{\frac{1}{\frac{x-scale}{a}}}\right) \cdot \frac{a}{x-scale}\right) \cdot \frac{b}{y-scale}\right) \]

    10. un-div-inv 94.1%

        \[\leadsto -4 \cdot \left(\left(\color{blue}{\frac{\frac{b}{y-scale}}{\frac{x-scale}{a}}} \cdot \frac{a}{x-scale}\right) \cdot \frac{b}{y-scale}\right) \]

15. Applied egg-rr 94.1%

    \[\leadsto -4 \cdot \color{blue}{\left(\left(\frac{\frac{b}{y-scale}}{\frac{x-scale}{a}} \cdot \frac{a}{x-scale}\right) \cdot \frac{b}{y-scale}\right)} \]

16. Final simplification 94.1%

    \[\leadsto -4 \cdot \left(\frac{b}{y-scale} \cdot \left(\frac{a}{x-scale} \cdot \frac{\frac{b}{y-scale}}{\frac{x-scale}{a}}\right)\right) \]
17. Add Preprocessing

Alternative 5: 35.2% accurate, 1693.0× speedup

Math

\[\begin{array}{l} \\ 0 \end{array} \]

FPCore

(FPCore (a b angle x-scale y-scale) :precision binary64 0.0)

C

double code(double a, double b, double angle, double x_45_scale, double y_45_scale) {
	return 0.0;
}

Fortran

real(8) function code(a, b, angle, x_45scale, y_45scale)
    real(8), intent (in) :: a
    real(8), intent (in) :: b
    real(8), intent (in) :: angle
    real(8), intent (in) :: x_45scale
    real(8), intent (in) :: y_45scale
    code = 0.0d0
end function

Java

public static double code(double a, double b, double angle, double x_45_scale, double y_45_scale) {
	return 0.0;
}

Python

def code(a, b, angle, x_45_scale, y_45_scale):
	return 0.0

Julia

function code(a, b, angle, x_45_scale, y_45_scale)
	return 0.0
end

MATLAB

function tmp = code(a, b, angle, x_45_scale, y_45_scale)
	tmp = 0.0;
end

Wolfram

code[a_, b_, angle_, x$45$scale_, y$45$scale_] := 0.0

Derivation

1. Initial program 26.8%

   \[\frac{\frac{\left(\left(2 \cdot \left({b}^{2} - {a}^{2}\right)\right) \cdot \sin \left(\frac{angle}{180} \cdot \pi\right)\right) \cdot \cos \left(\frac{angle}{180} \cdot \pi\right)}{x-scale}}{y-scale} \cdot \frac{\frac{\left(\left(2 \cdot \left({b}^{2} - {a}^{2}\right)\right) \cdot \sin \left(\frac{angle}{180} \cdot \pi\right)\right) \cdot \cos \left(\frac{angle}{180} \cdot \pi\right)}{x-scale}}{y-scale} - \left(4 \cdot \frac{\frac{{\left(a \cdot \sin \left(\frac{angle}{180} \cdot \pi\right)\right)}^{2} + {\left(b \cdot \cos \left(\frac{angle}{180} \cdot \pi\right)\right)}^{2}}{x-scale}}{x-scale}\right) \cdot \frac{\frac{{\left(a \cdot \cos \left(\frac{angle}{180} \cdot \pi\right)\right)}^{2} + {\left(b \cdot \sin \left(\frac{angle}{180} \cdot \pi\right)\right)}^{2}}{y-scale}}{y-scale} \]

3. Simplified 23.6%

   \[\leadsto \color{blue}{\mathsf{fma}\left(\cos \left(\frac{angle \cdot \pi}{180}\right) \cdot \frac{\left({b}^{2} - {a}^{2}\right) \cdot \left(2 \cdot \sin \left(\frac{angle \cdot \pi}{180}\right)\right)}{x-scale \cdot y-scale}, \cos \left(\frac{angle \cdot \pi}{180}\right) \cdot \frac{\left({b}^{2} - {a}^{2}\right) \cdot \left(2 \cdot \sin \left(\frac{angle \cdot \pi}{180}\right)\right)}{x-scale \cdot y-scale}, \frac{{\left(a \cdot \cos \left(\frac{angle \cdot \pi}{180}\right)\right)}^{2} + {\left(b \cdot \sin \left(\frac{angle \cdot \pi}{180}\right)\right)}^{2}}{{y-scale}^{2}} \cdot \left(\frac{{\left(a \cdot \sin \left(\frac{angle \cdot \pi}{180}\right)\right)}^{2} + {\left(b \cdot \cos \left(\frac{angle \cdot \pi}{180}\right)\right)}^{2}}{{x-scale}^{2}} \cdot -4\right)\right)} \]
4. Add Preprocessing

5. Taylor expanded in b around 0 25.5%

   \[\leadsto \color{blue}{-4 \cdot \frac{{a}^{4} \cdot \left({\cos \left(0.005555555555555556 \cdot \left(angle \cdot \pi\right)\right)}^{2} \cdot {\sin \left(0.005555555555555556 \cdot \left(angle \cdot \pi\right)\right)}^{2}\right)}{{x-scale}^{2} \cdot {y-scale}^{2}} + 4 \cdot \frac{{a}^{4} \cdot \left({\cos \left(0.005555555555555556 \cdot \left(angle \cdot \pi\right)\right)}^{2} \cdot {\sin \left(0.005555555555555556 \cdot \left(angle \cdot \pi\right)\right)}^{2}\right)}{{x-scale}^{2} \cdot {y-scale}^{2}}} \]
6. Step-by-step derivation

   1. distribute-rgt-out 25.5%

      \[\leadsto \color{blue}{\frac{{a}^{4} \cdot \left({\cos \left(0.005555555555555556 \cdot \left(angle \cdot \pi\right)\right)}^{2} \cdot {\sin \left(0.005555555555555556 \cdot \left(angle \cdot \pi\right)\right)}^{2}\right)}{{x-scale}^{2} \cdot {y-scale}^{2}} \cdot \left(-4 + 4\right)} \]

   2. metadata-eval 25.5%

      \[\leadsto \frac{{a}^{4} \cdot \left({\cos \left(0.005555555555555556 \cdot \left(angle \cdot \pi\right)\right)}^{2} \cdot {\sin \left(0.005555555555555556 \cdot \left(angle \cdot \pi\right)\right)}^{2}\right)}{{x-scale}^{2} \cdot {y-scale}^{2}} \cdot \color{blue}{0} \]

   3. mul0-rgt 37.3%

      \[\leadsto \color{blue}{0} \]

7. Simplified 37.3%

   \[\leadsto \color{blue}{0} \]
8. Add Preprocessing

Reproduce

herbie shell --seed 2024112 
(FPCore (a b angle x-scale y-scale)
  :name "Simplification of discriminant from scale-rotated-ellipse"
  :precision binary64
  (- (* (/ (/ (* (* (* 2.0 (- (pow b 2.0) (pow a 2.0))) (sin (* (/ angle 180.0) PI))) (cos (* (/ angle 180.0) PI))) x-scale) y-scale) (/ (/ (* (* (* 2.0 (- (pow b 2.0) (pow a 2.0))) (sin (* (/ angle 180.0) PI))) (cos (* (/ angle 180.0) PI))) x-scale) y-scale)) (* (* 4.0 (/ (/ (+ (pow (* a (sin (* (/ angle 180.0) PI))) 2.0) (pow (* b (cos (* (/ angle 180.0) PI))) 2.0)) x-scale) x-scale)) (/ (/ (+ (pow (* a (cos (* (/ angle 180.0) PI))) 2.0) (pow (* b (sin (* (/ angle 180.0) PI))) 2.0)) y-scale) y-scale))))