Numeric.SpecFunctions:incompleteBetaApprox from math-functions-0.1.5.2, B

Percentage Accurate: 96.7% → 99.6%
Time: 19.8s
Alternatives: 22
Speedup: 315.0×

Specification

?
\[x \cdot e^{y \cdot \left(\log z - t\right) + a \cdot \left(\log \left(1 - z\right) - b\right)} \]

Local Percentage Accuracy vs ?

The average percentage accuracy by input value. Horizontal axis shows value of an input variable; the variable is choosen in the title. Vertical axis is accuracy; higher is better. Red represent the original program, while blue represents Herbie's suggestion. These can be toggled with buttons below the plot. The line is an average while dots represent individual samples.

Accuracy vs Speed?

Herbie found 22 alternatives:

AlternativeAccuracySpeedup
The accuracy (vertical axis) and speed (horizontal axis) of each alternatives. Up and to the right is better. The red square shows the initial program, and each blue circle shows an alternative.The line shows the best available speed-accuracy tradeoffs.

Alternative 1: 99.6% accurate, 0.8× speedup?

\[x \cdot e^{\mathsf{fma}\left(a, \mathsf{log1p}\left(-z\right) - b, y \cdot \left(\log z - t\right)\right)} \]
Derivation
  1. Initial program 95.6%

    \[x \cdot e^{y \cdot \left(\log z - t\right) + a \cdot \left(\log \left(1 - z\right) - b\right)} \]
  2. Step-by-step derivation
    1. +-commutative95.6%

      \[\leadsto x \cdot e^{\color{blue}{a \cdot \left(\log \left(1 - z\right) - b\right) + y \cdot \left(\log z - t\right)}} \]
    2. fma-def96.4%

      \[\leadsto x \cdot e^{\color{blue}{\mathsf{fma}\left(a, \log \left(1 - z\right) - b, y \cdot \left(\log z - t\right)\right)}} \]
    3. sub-neg96.4%

      \[\leadsto x \cdot e^{\mathsf{fma}\left(a, \log \color{blue}{\left(1 + \left(-z\right)\right)} - b, y \cdot \left(\log z - t\right)\right)} \]
    4. log1p-def99.6%

      \[\leadsto x \cdot e^{\mathsf{fma}\left(a, \color{blue}{\mathsf{log1p}\left(-z\right)} - b, y \cdot \left(\log z - t\right)\right)} \]
  3. Simplified99.6%

    \[\leadsto \color{blue}{x \cdot e^{\mathsf{fma}\left(a, \mathsf{log1p}\left(-z\right) - b, y \cdot \left(\log z - t\right)\right)}} \]
  4. Final simplification99.6%

    \[\leadsto x \cdot e^{\mathsf{fma}\left(a, \mathsf{log1p}\left(-z\right) - b, y \cdot \left(\log z - t\right)\right)} \]

Alternative 2: 95.8% accurate, 1.0× speedup?

\[\begin{array}{l} \mathbf{if}\;a \leq 8.5 \cdot 10^{+134}:\\ \;\;\;\;x \cdot e^{y \cdot \left(\log z - t\right) + a \cdot \left(\log \left(1 - z\right) - b\right)}\\ \mathbf{else}:\\ \;\;\;\;x \cdot e^{a \cdot \left(\left(-z\right) - b\right)}\\ \end{array} \]
Derivation
  1. Split input into 2 regimes
  2. if a < 8.50000000000000024e134

    1. Initial program 97.4%

      \[x \cdot e^{y \cdot \left(\log z - t\right) + a \cdot \left(\log \left(1 - z\right) - b\right)} \]

    if 8.50000000000000024e134 < a

    1. Initial program 83.0%

      \[x \cdot e^{y \cdot \left(\log z - t\right) + a \cdot \left(\log \left(1 - z\right) - b\right)} \]
    2. Taylor expanded in y around 0 83.2%

      \[\leadsto x \cdot e^{\color{blue}{\left(\log \left(1 - z\right) - b\right) \cdot a}} \]
    3. Step-by-step derivation
      1. sub-neg83.2%

        \[\leadsto x \cdot e^{\left(\log \color{blue}{\left(1 + \left(-z\right)\right)} - b\right) \cdot a} \]
      2. mul-1-neg83.2%

        \[\leadsto x \cdot e^{\left(\log \left(1 + \color{blue}{-1 \cdot z}\right) - b\right) \cdot a} \]
      3. log1p-def96.8%

        \[\leadsto x \cdot e^{\left(\color{blue}{\mathsf{log1p}\left(-1 \cdot z\right)} - b\right) \cdot a} \]
      4. mul-1-neg96.8%

        \[\leadsto x \cdot e^{\left(\mathsf{log1p}\left(\color{blue}{-z}\right) - b\right) \cdot a} \]
    4. Simplified96.8%

      \[\leadsto x \cdot e^{\color{blue}{\left(\mathsf{log1p}\left(-z\right) - b\right) \cdot a}} \]
    5. Taylor expanded in z around 0 96.8%

      \[\leadsto x \cdot e^{\color{blue}{-1 \cdot \left(a \cdot z\right) + -1 \cdot \left(a \cdot b\right)}} \]
    6. Step-by-step derivation
      1. associate-*r*96.8%

        \[\leadsto x \cdot e^{\color{blue}{\left(-1 \cdot a\right) \cdot z} + -1 \cdot \left(a \cdot b\right)} \]
      2. associate-*r*96.8%

        \[\leadsto x \cdot e^{\left(-1 \cdot a\right) \cdot z + \color{blue}{\left(-1 \cdot a\right) \cdot b}} \]
      3. distribute-lft-out96.8%

        \[\leadsto x \cdot e^{\color{blue}{\left(-1 \cdot a\right) \cdot \left(z + b\right)}} \]
      4. mul-1-neg96.8%

        \[\leadsto x \cdot e^{\color{blue}{\left(-a\right)} \cdot \left(z + b\right)} \]
    7. Simplified96.8%

      \[\leadsto x \cdot e^{\color{blue}{\left(-a\right) \cdot \left(z + b\right)}} \]
  3. Recombined 2 regimes into one program.
  4. Final simplification97.3%

    \[\leadsto \begin{array}{l} \mathbf{if}\;a \leq 8.5 \cdot 10^{+134}:\\ \;\;\;\;x \cdot e^{y \cdot \left(\log z - t\right) + a \cdot \left(\log \left(1 - z\right) - b\right)}\\ \mathbf{else}:\\ \;\;\;\;x \cdot e^{a \cdot \left(\left(-z\right) - b\right)}\\ \end{array} \]

Alternative 3: 87.0% accurate, 1.5× speedup?

\[\begin{array}{l} \mathbf{if}\;y \leq -3.8 \cdot 10^{-5} \lor \neg \left(y \leq 2.8 \cdot 10^{-41}\right):\\ \;\;\;\;x \cdot e^{y \cdot \left(\log z - t\right)}\\ \mathbf{else}:\\ \;\;\;\;x \cdot e^{a \cdot \left(\left(-z\right) - b\right)}\\ \end{array} \]
Derivation
  1. Split input into 2 regimes
  2. if y < -3.8000000000000002e-5 or 2.8000000000000002e-41 < y

    1. Initial program 95.9%

      \[x \cdot e^{y \cdot \left(\log z - t\right) + a \cdot \left(\log \left(1 - z\right) - b\right)} \]
    2. Taylor expanded in y around inf 91.1%

      \[\leadsto x \cdot e^{\color{blue}{\left(\log z - t\right) \cdot y}} \]

    if -3.8000000000000002e-5 < y < 2.8000000000000002e-41

    1. Initial program 95.4%

      \[x \cdot e^{y \cdot \left(\log z - t\right) + a \cdot \left(\log \left(1 - z\right) - b\right)} \]
    2. Taylor expanded in y around 0 80.7%

      \[\leadsto x \cdot e^{\color{blue}{\left(\log \left(1 - z\right) - b\right) \cdot a}} \]
    3. Step-by-step derivation
      1. sub-neg80.7%

        \[\leadsto x \cdot e^{\left(\log \color{blue}{\left(1 + \left(-z\right)\right)} - b\right) \cdot a} \]
      2. mul-1-neg80.7%

        \[\leadsto x \cdot e^{\left(\log \left(1 + \color{blue}{-1 \cdot z}\right) - b\right) \cdot a} \]
      3. log1p-def85.3%

        \[\leadsto x \cdot e^{\left(\color{blue}{\mathsf{log1p}\left(-1 \cdot z\right)} - b\right) \cdot a} \]
      4. mul-1-neg85.3%

        \[\leadsto x \cdot e^{\left(\mathsf{log1p}\left(\color{blue}{-z}\right) - b\right) \cdot a} \]
    4. Simplified85.3%

      \[\leadsto x \cdot e^{\color{blue}{\left(\mathsf{log1p}\left(-z\right) - b\right) \cdot a}} \]
    5. Taylor expanded in z around 0 85.3%

      \[\leadsto x \cdot e^{\color{blue}{-1 \cdot \left(a \cdot z\right) + -1 \cdot \left(a \cdot b\right)}} \]
    6. Step-by-step derivation
      1. associate-*r*85.3%

        \[\leadsto x \cdot e^{\color{blue}{\left(-1 \cdot a\right) \cdot z} + -1 \cdot \left(a \cdot b\right)} \]
      2. associate-*r*85.3%

        \[\leadsto x \cdot e^{\left(-1 \cdot a\right) \cdot z + \color{blue}{\left(-1 \cdot a\right) \cdot b}} \]
      3. distribute-lft-out85.3%

        \[\leadsto x \cdot e^{\color{blue}{\left(-1 \cdot a\right) \cdot \left(z + b\right)}} \]
      4. mul-1-neg85.3%

        \[\leadsto x \cdot e^{\color{blue}{\left(-a\right)} \cdot \left(z + b\right)} \]
    7. Simplified85.3%

      \[\leadsto x \cdot e^{\color{blue}{\left(-a\right) \cdot \left(z + b\right)}} \]
  3. Recombined 2 regimes into one program.
  4. Final simplification88.0%

    \[\leadsto \begin{array}{l} \mathbf{if}\;y \leq -3.8 \cdot 10^{-5} \lor \neg \left(y \leq 2.8 \cdot 10^{-41}\right):\\ \;\;\;\;x \cdot e^{y \cdot \left(\log z - t\right)}\\ \mathbf{else}:\\ \;\;\;\;x \cdot e^{a \cdot \left(\left(-z\right) - b\right)}\\ \end{array} \]

Alternative 4: 70.8% accurate, 2.8× speedup?

\[\begin{array}{l} t_1 := x \cdot e^{b \cdot \left(-a\right)}\\ t_2 := x \cdot e^{y \cdot \left(-t\right)}\\ \mathbf{if}\;t \leq -1.6 \cdot 10^{+132}:\\ \;\;\;\;t_2\\ \mathbf{elif}\;t \leq 1.35 \cdot 10^{-303}:\\ \;\;\;\;t_1\\ \mathbf{elif}\;t \leq 1.26 \cdot 10^{-101}:\\ \;\;\;\;x \cdot {z}^{y}\\ \mathbf{elif}\;t \leq 7.2 \cdot 10^{+69}:\\ \;\;\;\;t_1\\ \mathbf{else}:\\ \;\;\;\;t_2\\ \end{array} \]
Derivation
  1. Split input into 3 regimes
  2. if t < -1.5999999999999999e132 or 7.2000000000000005e69 < t

    1. Initial program 94.5%

      \[x \cdot e^{y \cdot \left(\log z - t\right) + a \cdot \left(\log \left(1 - z\right) - b\right)} \]
    2. Taylor expanded in t around inf 85.0%

      \[\leadsto x \cdot e^{\color{blue}{-1 \cdot \left(y \cdot t\right)}} \]
    3. Step-by-step derivation
      1. mul-1-neg85.0%

        \[\leadsto x \cdot e^{\color{blue}{-y \cdot t}} \]
      2. distribute-rgt-neg-out85.0%

        \[\leadsto x \cdot e^{\color{blue}{y \cdot \left(-t\right)}} \]
    4. Simplified85.0%

      \[\leadsto x \cdot e^{\color{blue}{y \cdot \left(-t\right)}} \]

    if -1.5999999999999999e132 < t < 1.34999999999999993e-303 or 1.26e-101 < t < 7.2000000000000005e69

    1. Initial program 96.2%

      \[x \cdot e^{y \cdot \left(\log z - t\right) + a \cdot \left(\log \left(1 - z\right) - b\right)} \]
    2. Taylor expanded in b around inf 76.5%

      \[\leadsto x \cdot e^{\color{blue}{-1 \cdot \left(a \cdot b\right)}} \]
    3. Step-by-step derivation
      1. associate-*r*76.5%

        \[\leadsto x \cdot e^{\color{blue}{\left(-1 \cdot a\right) \cdot b}} \]
      2. neg-mul-176.5%

        \[\leadsto x \cdot e^{\color{blue}{\left(-a\right)} \cdot b} \]
      3. *-commutative76.5%

        \[\leadsto x \cdot e^{\color{blue}{b \cdot \left(-a\right)}} \]
    4. Simplified76.5%

      \[\leadsto x \cdot e^{\color{blue}{b \cdot \left(-a\right)}} \]

    if 1.34999999999999993e-303 < t < 1.26e-101

    1. Initial program 96.2%

      \[x \cdot e^{y \cdot \left(\log z - t\right) + a \cdot \left(\log \left(1 - z\right) - b\right)} \]
    2. Taylor expanded in y around inf 72.2%

      \[\leadsto x \cdot e^{\color{blue}{\left(\log z - t\right) \cdot y}} \]
    3. Taylor expanded in t around 0 72.2%

      \[\leadsto \color{blue}{{z}^{y} \cdot x} \]
  3. Recombined 3 regimes into one program.
  4. Final simplification78.7%

    \[\leadsto \begin{array}{l} \mathbf{if}\;t \leq -1.6 \cdot 10^{+132}:\\ \;\;\;\;x \cdot e^{y \cdot \left(-t\right)}\\ \mathbf{elif}\;t \leq 1.35 \cdot 10^{-303}:\\ \;\;\;\;x \cdot e^{b \cdot \left(-a\right)}\\ \mathbf{elif}\;t \leq 1.26 \cdot 10^{-101}:\\ \;\;\;\;x \cdot {z}^{y}\\ \mathbf{elif}\;t \leq 7.2 \cdot 10^{+69}:\\ \;\;\;\;x \cdot e^{b \cdot \left(-a\right)}\\ \mathbf{else}:\\ \;\;\;\;x \cdot e^{y \cdot \left(-t\right)}\\ \end{array} \]

Alternative 5: 73.3% accurate, 2.8× speedup?

\[\begin{array}{l} \mathbf{if}\;y \leq -2.9 \cdot 10^{+23}:\\ \;\;\;\;x \cdot {z}^{y}\\ \mathbf{elif}\;y \leq 5.8 \cdot 10^{-41}:\\ \;\;\;\;x \cdot e^{a \cdot \left(\left(-z\right) - b\right)}\\ \mathbf{else}:\\ \;\;\;\;x \cdot e^{y \cdot \left(-t\right)}\\ \end{array} \]
Derivation
  1. Split input into 3 regimes
  2. if y < -2.90000000000000013e23

    1. Initial program 93.2%

      \[x \cdot e^{y \cdot \left(\log z - t\right) + a \cdot \left(\log \left(1 - z\right) - b\right)} \]
    2. Taylor expanded in y around inf 91.7%

      \[\leadsto x \cdot e^{\color{blue}{\left(\log z - t\right) \cdot y}} \]
    3. Taylor expanded in t around 0 76.6%

      \[\leadsto \color{blue}{{z}^{y} \cdot x} \]

    if -2.90000000000000013e23 < y < 5.79999999999999955e-41

    1. Initial program 95.5%

      \[x \cdot e^{y \cdot \left(\log z - t\right) + a \cdot \left(\log \left(1 - z\right) - b\right)} \]
    2. Taylor expanded in y around 0 79.3%

      \[\leadsto x \cdot e^{\color{blue}{\left(\log \left(1 - z\right) - b\right) \cdot a}} \]
    3. Step-by-step derivation
      1. sub-neg79.3%

        \[\leadsto x \cdot e^{\left(\log \color{blue}{\left(1 + \left(-z\right)\right)} - b\right) \cdot a} \]
      2. mul-1-neg79.3%

        \[\leadsto x \cdot e^{\left(\log \left(1 + \color{blue}{-1 \cdot z}\right) - b\right) \cdot a} \]
      3. log1p-def83.8%

        \[\leadsto x \cdot e^{\left(\color{blue}{\mathsf{log1p}\left(-1 \cdot z\right)} - b\right) \cdot a} \]
      4. mul-1-neg83.8%

        \[\leadsto x \cdot e^{\left(\mathsf{log1p}\left(\color{blue}{-z}\right) - b\right) \cdot a} \]
    4. Simplified83.8%

      \[\leadsto x \cdot e^{\color{blue}{\left(\mathsf{log1p}\left(-z\right) - b\right) \cdot a}} \]
    5. Taylor expanded in z around 0 83.8%

      \[\leadsto x \cdot e^{\color{blue}{-1 \cdot \left(a \cdot z\right) + -1 \cdot \left(a \cdot b\right)}} \]
    6. Step-by-step derivation
      1. associate-*r*83.8%

        \[\leadsto x \cdot e^{\color{blue}{\left(-1 \cdot a\right) \cdot z} + -1 \cdot \left(a \cdot b\right)} \]
      2. associate-*r*83.8%

        \[\leadsto x \cdot e^{\left(-1 \cdot a\right) \cdot z + \color{blue}{\left(-1 \cdot a\right) \cdot b}} \]
      3. distribute-lft-out83.8%

        \[\leadsto x \cdot e^{\color{blue}{\left(-1 \cdot a\right) \cdot \left(z + b\right)}} \]
      4. mul-1-neg83.8%

        \[\leadsto x \cdot e^{\color{blue}{\left(-a\right)} \cdot \left(z + b\right)} \]
    7. Simplified83.8%

      \[\leadsto x \cdot e^{\color{blue}{\left(-a\right) \cdot \left(z + b\right)}} \]

    if 5.79999999999999955e-41 < y

    1. Initial program 98.3%

      \[x \cdot e^{y \cdot \left(\log z - t\right) + a \cdot \left(\log \left(1 - z\right) - b\right)} \]
    2. Taylor expanded in t around inf 67.6%

      \[\leadsto x \cdot e^{\color{blue}{-1 \cdot \left(y \cdot t\right)}} \]
    3. Step-by-step derivation
      1. mul-1-neg67.6%

        \[\leadsto x \cdot e^{\color{blue}{-y \cdot t}} \]
      2. distribute-rgt-neg-out67.6%

        \[\leadsto x \cdot e^{\color{blue}{y \cdot \left(-t\right)}} \]
    4. Simplified67.6%

      \[\leadsto x \cdot e^{\color{blue}{y \cdot \left(-t\right)}} \]
  3. Recombined 3 regimes into one program.
  4. Final simplification78.5%

    \[\leadsto \begin{array}{l} \mathbf{if}\;y \leq -2.9 \cdot 10^{+23}:\\ \;\;\;\;x \cdot {z}^{y}\\ \mathbf{elif}\;y \leq 5.8 \cdot 10^{-41}:\\ \;\;\;\;x \cdot e^{a \cdot \left(\left(-z\right) - b\right)}\\ \mathbf{else}:\\ \;\;\;\;x \cdot e^{y \cdot \left(-t\right)}\\ \end{array} \]

Alternative 6: 73.6% accurate, 2.9× speedup?

\[\begin{array}{l} \mathbf{if}\;y \leq -2.25 \cdot 10^{+23} \lor \neg \left(y \leq 1.12\right):\\ \;\;\;\;x \cdot {z}^{y}\\ \mathbf{else}:\\ \;\;\;\;x \cdot e^{b \cdot \left(-a\right)}\\ \end{array} \]
Derivation
  1. Split input into 2 regimes
  2. if y < -2.2499999999999999e23 or 1.1200000000000001 < y

    1. Initial program 95.4%

      \[x \cdot e^{y \cdot \left(\log z - t\right) + a \cdot \left(\log \left(1 - z\right) - b\right)} \]
    2. Taylor expanded in y around inf 91.0%

      \[\leadsto x \cdot e^{\color{blue}{\left(\log z - t\right) \cdot y}} \]
    3. Taylor expanded in t around 0 73.8%

      \[\leadsto \color{blue}{{z}^{y} \cdot x} \]

    if -2.2499999999999999e23 < y < 1.1200000000000001

    1. Initial program 95.7%

      \[x \cdot e^{y \cdot \left(\log z - t\right) + a \cdot \left(\log \left(1 - z\right) - b\right)} \]
    2. Taylor expanded in b around inf 75.7%

      \[\leadsto x \cdot e^{\color{blue}{-1 \cdot \left(a \cdot b\right)}} \]
    3. Step-by-step derivation
      1. associate-*r*75.7%

        \[\leadsto x \cdot e^{\color{blue}{\left(-1 \cdot a\right) \cdot b}} \]
      2. neg-mul-175.7%

        \[\leadsto x \cdot e^{\color{blue}{\left(-a\right)} \cdot b} \]
      3. *-commutative75.7%

        \[\leadsto x \cdot e^{\color{blue}{b \cdot \left(-a\right)}} \]
    4. Simplified75.7%

      \[\leadsto x \cdot e^{\color{blue}{b \cdot \left(-a\right)}} \]
  3. Recombined 2 regimes into one program.
  4. Final simplification74.9%

    \[\leadsto \begin{array}{l} \mathbf{if}\;y \leq -2.25 \cdot 10^{+23} \lor \neg \left(y \leq 1.12\right):\\ \;\;\;\;x \cdot {z}^{y}\\ \mathbf{else}:\\ \;\;\;\;x \cdot e^{b \cdot \left(-a\right)}\\ \end{array} \]

Alternative 7: 57.1% accurate, 2.9× speedup?

\[\begin{array}{l} \mathbf{if}\;a \leq -4 \cdot 10^{+161}:\\ \;\;\;\;x \cdot \left(1 + b \cdot \left(b \cdot \left(a \cdot \left(a \cdot 0.5\right)\right) - a\right)\right)\\ \mathbf{elif}\;a \leq 2.25 \cdot 10^{+116}:\\ \;\;\;\;x \cdot {z}^{y}\\ \mathbf{else}:\\ \;\;\;\;a \cdot \left(\left(a \cdot 0.5\right) \cdot \left(x \cdot \left(b \cdot b\right)\right)\right)\\ \end{array} \]
Derivation
  1. Split input into 3 regimes
  2. if a < -4.0000000000000002e161

    1. Initial program 87.2%

      \[x \cdot e^{y \cdot \left(\log z - t\right) + a \cdot \left(\log \left(1 - z\right) - b\right)} \]
    2. Taylor expanded in b around inf 77.8%

      \[\leadsto x \cdot e^{\color{blue}{-1 \cdot \left(a \cdot b\right)}} \]
    3. Step-by-step derivation
      1. associate-*r*77.8%

        \[\leadsto x \cdot e^{\color{blue}{\left(-1 \cdot a\right) \cdot b}} \]
      2. neg-mul-177.8%

        \[\leadsto x \cdot e^{\color{blue}{\left(-a\right)} \cdot b} \]
      3. *-commutative77.8%

        \[\leadsto x \cdot e^{\color{blue}{b \cdot \left(-a\right)}} \]
    4. Simplified77.8%

      \[\leadsto x \cdot e^{\color{blue}{b \cdot \left(-a\right)}} \]
    5. Taylor expanded in b around 0 55.0%

      \[\leadsto x \cdot \color{blue}{\left(1 + \left(0.5 \cdot \left({a}^{2} \cdot {b}^{2}\right) + -1 \cdot \left(a \cdot b\right)\right)\right)} \]
    6. Step-by-step derivation
      1. mul-1-neg55.0%

        \[\leadsto x \cdot \left(1 + \left(0.5 \cdot \left({a}^{2} \cdot {b}^{2}\right) + \color{blue}{\left(-a \cdot b\right)}\right)\right) \]
      2. unsub-neg55.0%

        \[\leadsto x \cdot \left(1 + \color{blue}{\left(0.5 \cdot \left({a}^{2} \cdot {b}^{2}\right) - a \cdot b\right)}\right) \]
      3. associate-*r*55.0%

        \[\leadsto x \cdot \left(1 + \left(\color{blue}{\left(0.5 \cdot {a}^{2}\right) \cdot {b}^{2}} - a \cdot b\right)\right) \]
      4. unpow255.0%

        \[\leadsto x \cdot \left(1 + \left(\left(0.5 \cdot {a}^{2}\right) \cdot \color{blue}{\left(b \cdot b\right)} - a \cdot b\right)\right) \]
      5. associate-*r*71.2%

        \[\leadsto x \cdot \left(1 + \left(\color{blue}{\left(\left(0.5 \cdot {a}^{2}\right) \cdot b\right) \cdot b} - a \cdot b\right)\right) \]
      6. distribute-rgt-out--74.6%

        \[\leadsto x \cdot \left(1 + \color{blue}{b \cdot \left(\left(0.5 \cdot {a}^{2}\right) \cdot b - a\right)}\right) \]
      7. *-commutative74.6%

        \[\leadsto x \cdot \left(1 + b \cdot \left(\color{blue}{\left({a}^{2} \cdot 0.5\right)} \cdot b - a\right)\right) \]
      8. unpow274.6%

        \[\leadsto x \cdot \left(1 + b \cdot \left(\left(\color{blue}{\left(a \cdot a\right)} \cdot 0.5\right) \cdot b - a\right)\right) \]
      9. associate-*l*74.6%

        \[\leadsto x \cdot \left(1 + b \cdot \left(\color{blue}{\left(a \cdot \left(a \cdot 0.5\right)\right)} \cdot b - a\right)\right) \]
    7. Simplified74.6%

      \[\leadsto x \cdot \color{blue}{\left(1 + b \cdot \left(\left(a \cdot \left(a \cdot 0.5\right)\right) \cdot b - a\right)\right)} \]

    if -4.0000000000000002e161 < a < 2.25000000000000008e116

    1. Initial program 98.9%

      \[x \cdot e^{y \cdot \left(\log z - t\right) + a \cdot \left(\log \left(1 - z\right) - b\right)} \]
    2. Taylor expanded in y around inf 80.6%

      \[\leadsto x \cdot e^{\color{blue}{\left(\log z - t\right) \cdot y}} \]
    3. Taylor expanded in t around 0 55.8%

      \[\leadsto \color{blue}{{z}^{y} \cdot x} \]

    if 2.25000000000000008e116 < a

    1. Initial program 86.5%

      \[x \cdot e^{y \cdot \left(\log z - t\right) + a \cdot \left(\log \left(1 - z\right) - b\right)} \]
    2. Taylor expanded in b around inf 76.6%

      \[\leadsto x \cdot e^{\color{blue}{-1 \cdot \left(a \cdot b\right)}} \]
    3. Step-by-step derivation
      1. associate-*r*76.6%

        \[\leadsto x \cdot e^{\color{blue}{\left(-1 \cdot a\right) \cdot b}} \]
      2. neg-mul-176.6%

        \[\leadsto x \cdot e^{\color{blue}{\left(-a\right)} \cdot b} \]
      3. *-commutative76.6%

        \[\leadsto x \cdot e^{\color{blue}{b \cdot \left(-a\right)}} \]
    4. Simplified76.6%

      \[\leadsto x \cdot e^{\color{blue}{b \cdot \left(-a\right)}} \]
    5. Taylor expanded in b around 0 33.9%

      \[\leadsto x \cdot \color{blue}{\left(1 + \left(0.5 \cdot \left({a}^{2} \cdot {b}^{2}\right) + -1 \cdot \left(a \cdot b\right)\right)\right)} \]
    6. Step-by-step derivation
      1. mul-1-neg33.9%

        \[\leadsto x \cdot \left(1 + \left(0.5 \cdot \left({a}^{2} \cdot {b}^{2}\right) + \color{blue}{\left(-a \cdot b\right)}\right)\right) \]
      2. unsub-neg33.9%

        \[\leadsto x \cdot \left(1 + \color{blue}{\left(0.5 \cdot \left({a}^{2} \cdot {b}^{2}\right) - a \cdot b\right)}\right) \]
      3. associate-*r*33.9%

        \[\leadsto x \cdot \left(1 + \left(\color{blue}{\left(0.5 \cdot {a}^{2}\right) \cdot {b}^{2}} - a \cdot b\right)\right) \]
      4. unpow233.9%

        \[\leadsto x \cdot \left(1 + \left(\left(0.5 \cdot {a}^{2}\right) \cdot \color{blue}{\left(b \cdot b\right)} - a \cdot b\right)\right) \]
      5. associate-*r*34.3%

        \[\leadsto x \cdot \left(1 + \left(\color{blue}{\left(\left(0.5 \cdot {a}^{2}\right) \cdot b\right) \cdot b} - a \cdot b\right)\right) \]
      6. distribute-rgt-out--34.5%

        \[\leadsto x \cdot \left(1 + \color{blue}{b \cdot \left(\left(0.5 \cdot {a}^{2}\right) \cdot b - a\right)}\right) \]
      7. *-commutative34.5%

        \[\leadsto x \cdot \left(1 + b \cdot \left(\color{blue}{\left({a}^{2} \cdot 0.5\right)} \cdot b - a\right)\right) \]
      8. unpow234.5%

        \[\leadsto x \cdot \left(1 + b \cdot \left(\left(\color{blue}{\left(a \cdot a\right)} \cdot 0.5\right) \cdot b - a\right)\right) \]
      9. associate-*l*34.5%

        \[\leadsto x \cdot \left(1 + b \cdot \left(\color{blue}{\left(a \cdot \left(a \cdot 0.5\right)\right)} \cdot b - a\right)\right) \]
    7. Simplified34.5%

      \[\leadsto x \cdot \color{blue}{\left(1 + b \cdot \left(\left(a \cdot \left(a \cdot 0.5\right)\right) \cdot b - a\right)\right)} \]
    8. Taylor expanded in b around inf 33.9%

      \[\leadsto \color{blue}{0.5 \cdot \left({a}^{2} \cdot \left({b}^{2} \cdot x\right)\right)} \]
    9. Step-by-step derivation
      1. associate-*r*33.9%

        \[\leadsto \color{blue}{\left(0.5 \cdot {a}^{2}\right) \cdot \left({b}^{2} \cdot x\right)} \]
      2. *-commutative33.9%

        \[\leadsto \color{blue}{\left({a}^{2} \cdot 0.5\right)} \cdot \left({b}^{2} \cdot x\right) \]
      3. unpow233.9%

        \[\leadsto \left(\color{blue}{\left(a \cdot a\right)} \cdot 0.5\right) \cdot \left({b}^{2} \cdot x\right) \]
      4. associate-*l*33.9%

        \[\leadsto \color{blue}{\left(a \cdot \left(a \cdot 0.5\right)\right)} \cdot \left({b}^{2} \cdot x\right) \]
      5. associate-*l*54.9%

        \[\leadsto \color{blue}{a \cdot \left(\left(a \cdot 0.5\right) \cdot \left({b}^{2} \cdot x\right)\right)} \]
      6. unpow254.9%

        \[\leadsto a \cdot \left(\left(a \cdot 0.5\right) \cdot \left(\color{blue}{\left(b \cdot b\right)} \cdot x\right)\right) \]
    10. Simplified54.9%

      \[\leadsto \color{blue}{a \cdot \left(\left(a \cdot 0.5\right) \cdot \left(\left(b \cdot b\right) \cdot x\right)\right)} \]
  3. Recombined 3 regimes into one program.
  4. Final simplification57.9%

    \[\leadsto \begin{array}{l} \mathbf{if}\;a \leq -4 \cdot 10^{+161}:\\ \;\;\;\;x \cdot \left(1 + b \cdot \left(b \cdot \left(a \cdot \left(a \cdot 0.5\right)\right) - a\right)\right)\\ \mathbf{elif}\;a \leq 2.25 \cdot 10^{+116}:\\ \;\;\;\;x \cdot {z}^{y}\\ \mathbf{else}:\\ \;\;\;\;a \cdot \left(\left(a \cdot 0.5\right) \cdot \left(x \cdot \left(b \cdot b\right)\right)\right)\\ \end{array} \]

Alternative 8: 37.1% accurate, 13.5× speedup?

\[\begin{array}{l} t_1 := a \cdot \left(\left(a \cdot 0.5\right) \cdot \left(x \cdot \left(b \cdot b\right)\right)\right)\\ \mathbf{if}\;t \leq -1.9 \cdot 10^{+137}:\\ \;\;\;\;x - t \cdot \left(x \cdot y\right)\\ \mathbf{elif}\;t \leq -0.00065:\\ \;\;\;\;t_1\\ \mathbf{elif}\;t \leq 9.5 \cdot 10^{+15}:\\ \;\;\;\;x \cdot \left(1 + a \cdot \left(\left(a \cdot 0.5\right) \cdot \left(b \cdot b\right)\right)\right)\\ \mathbf{elif}\;t \leq 7.4 \cdot 10^{+245} \lor \neg \left(t \leq 6.8 \cdot 10^{+276}\right):\\ \;\;\;\;t_1\\ \mathbf{else}:\\ \;\;\;\;x + 0.5 \cdot \left(\left(y \cdot y\right) \cdot \left(x \cdot \left(t \cdot t\right)\right)\right)\\ \end{array} \]
Derivation
  1. Split input into 4 regimes
  2. if t < -1.89999999999999981e137

    1. Initial program 97.1%

      \[x \cdot e^{y \cdot \left(\log z - t\right) + a \cdot \left(\log \left(1 - z\right) - b\right)} \]
    2. Taylor expanded in t around inf 88.6%

      \[\leadsto x \cdot e^{\color{blue}{-1 \cdot \left(y \cdot t\right)}} \]
    3. Step-by-step derivation
      1. mul-1-neg88.6%

        \[\leadsto x \cdot e^{\color{blue}{-y \cdot t}} \]
      2. distribute-rgt-neg-out88.6%

        \[\leadsto x \cdot e^{\color{blue}{y \cdot \left(-t\right)}} \]
    4. Simplified88.6%

      \[\leadsto x \cdot e^{\color{blue}{y \cdot \left(-t\right)}} \]
    5. Taylor expanded in y around 0 37.1%

      \[\leadsto \color{blue}{-1 \cdot \left(y \cdot \left(t \cdot x\right)\right) + x} \]
    6. Step-by-step derivation
      1. +-commutative37.1%

        \[\leadsto \color{blue}{x + -1 \cdot \left(y \cdot \left(t \cdot x\right)\right)} \]
      2. mul-1-neg37.1%

        \[\leadsto x + \color{blue}{\left(-y \cdot \left(t \cdot x\right)\right)} \]
      3. unsub-neg37.1%

        \[\leadsto \color{blue}{x - y \cdot \left(t \cdot x\right)} \]
    7. Simplified37.1%

      \[\leadsto \color{blue}{x - y \cdot \left(t \cdot x\right)} \]
    8. Taylor expanded in x around 0 39.8%

      \[\leadsto \color{blue}{\left(1 - y \cdot t\right) \cdot x} \]
    9. Step-by-step derivation
      1. *-commutative39.8%

        \[\leadsto \color{blue}{x \cdot \left(1 - y \cdot t\right)} \]
      2. distribute-rgt-out--39.8%

        \[\leadsto \color{blue}{1 \cdot x - \left(y \cdot t\right) \cdot x} \]
      3. associate-*r*37.1%

        \[\leadsto 1 \cdot x - \color{blue}{y \cdot \left(t \cdot x\right)} \]
      4. *-commutative37.1%

        \[\leadsto 1 \cdot x - y \cdot \color{blue}{\left(x \cdot t\right)} \]
      5. *-lft-identity37.1%

        \[\leadsto \color{blue}{x} - y \cdot \left(x \cdot t\right) \]
      6. *-commutative37.1%

        \[\leadsto x - \color{blue}{\left(x \cdot t\right) \cdot y} \]
      7. *-commutative37.1%

        \[\leadsto x - \color{blue}{\left(t \cdot x\right)} \cdot y \]
      8. associate-*l*39.8%

        \[\leadsto x - \color{blue}{t \cdot \left(x \cdot y\right)} \]
    10. Simplified39.8%

      \[\leadsto \color{blue}{x - t \cdot \left(x \cdot y\right)} \]

    if -1.89999999999999981e137 < t < -6.4999999999999997e-4 or 9.5e15 < t < 7.4000000000000002e245 or 6.79999999999999967e276 < t

    1. Initial program 92.9%

      \[x \cdot e^{y \cdot \left(\log z - t\right) + a \cdot \left(\log \left(1 - z\right) - b\right)} \]
    2. Taylor expanded in b around inf 46.3%

      \[\leadsto x \cdot e^{\color{blue}{-1 \cdot \left(a \cdot b\right)}} \]
    3. Step-by-step derivation
      1. associate-*r*46.3%

        \[\leadsto x \cdot e^{\color{blue}{\left(-1 \cdot a\right) \cdot b}} \]
      2. neg-mul-146.3%

        \[\leadsto x \cdot e^{\color{blue}{\left(-a\right)} \cdot b} \]
      3. *-commutative46.3%

        \[\leadsto x \cdot e^{\color{blue}{b \cdot \left(-a\right)}} \]
    4. Simplified46.3%

      \[\leadsto x \cdot e^{\color{blue}{b \cdot \left(-a\right)}} \]
    5. Taylor expanded in b around 0 25.9%

      \[\leadsto x \cdot \color{blue}{\left(1 + \left(0.5 \cdot \left({a}^{2} \cdot {b}^{2}\right) + -1 \cdot \left(a \cdot b\right)\right)\right)} \]
    6. Step-by-step derivation
      1. mul-1-neg25.9%

        \[\leadsto x \cdot \left(1 + \left(0.5 \cdot \left({a}^{2} \cdot {b}^{2}\right) + \color{blue}{\left(-a \cdot b\right)}\right)\right) \]
      2. unsub-neg25.9%

        \[\leadsto x \cdot \left(1 + \color{blue}{\left(0.5 \cdot \left({a}^{2} \cdot {b}^{2}\right) - a \cdot b\right)}\right) \]
      3. associate-*r*25.9%

        \[\leadsto x \cdot \left(1 + \left(\color{blue}{\left(0.5 \cdot {a}^{2}\right) \cdot {b}^{2}} - a \cdot b\right)\right) \]
      4. unpow225.9%

        \[\leadsto x \cdot \left(1 + \left(\left(0.5 \cdot {a}^{2}\right) \cdot \color{blue}{\left(b \cdot b\right)} - a \cdot b\right)\right) \]
      5. associate-*r*27.5%

        \[\leadsto x \cdot \left(1 + \left(\color{blue}{\left(\left(0.5 \cdot {a}^{2}\right) \cdot b\right) \cdot b} - a \cdot b\right)\right) \]
      6. distribute-rgt-out--27.6%

        \[\leadsto x \cdot \left(1 + \color{blue}{b \cdot \left(\left(0.5 \cdot {a}^{2}\right) \cdot b - a\right)}\right) \]
      7. *-commutative27.6%

        \[\leadsto x \cdot \left(1 + b \cdot \left(\color{blue}{\left({a}^{2} \cdot 0.5\right)} \cdot b - a\right)\right) \]
      8. unpow227.6%

        \[\leadsto x \cdot \left(1 + b \cdot \left(\left(\color{blue}{\left(a \cdot a\right)} \cdot 0.5\right) \cdot b - a\right)\right) \]
      9. associate-*l*27.6%

        \[\leadsto x \cdot \left(1 + b \cdot \left(\color{blue}{\left(a \cdot \left(a \cdot 0.5\right)\right)} \cdot b - a\right)\right) \]
    7. Simplified27.6%

      \[\leadsto x \cdot \color{blue}{\left(1 + b \cdot \left(\left(a \cdot \left(a \cdot 0.5\right)\right) \cdot b - a\right)\right)} \]
    8. Taylor expanded in b around inf 37.4%

      \[\leadsto \color{blue}{0.5 \cdot \left({a}^{2} \cdot \left({b}^{2} \cdot x\right)\right)} \]
    9. Step-by-step derivation
      1. associate-*r*37.4%

        \[\leadsto \color{blue}{\left(0.5 \cdot {a}^{2}\right) \cdot \left({b}^{2} \cdot x\right)} \]
      2. *-commutative37.4%

        \[\leadsto \color{blue}{\left({a}^{2} \cdot 0.5\right)} \cdot \left({b}^{2} \cdot x\right) \]
      3. unpow237.4%

        \[\leadsto \left(\color{blue}{\left(a \cdot a\right)} \cdot 0.5\right) \cdot \left({b}^{2} \cdot x\right) \]
      4. associate-*l*37.4%

        \[\leadsto \color{blue}{\left(a \cdot \left(a \cdot 0.5\right)\right)} \cdot \left({b}^{2} \cdot x\right) \]
      5. associate-*l*47.2%

        \[\leadsto \color{blue}{a \cdot \left(\left(a \cdot 0.5\right) \cdot \left({b}^{2} \cdot x\right)\right)} \]
      6. unpow247.2%

        \[\leadsto a \cdot \left(\left(a \cdot 0.5\right) \cdot \left(\color{blue}{\left(b \cdot b\right)} \cdot x\right)\right) \]
    10. Simplified47.2%

      \[\leadsto \color{blue}{a \cdot \left(\left(a \cdot 0.5\right) \cdot \left(\left(b \cdot b\right) \cdot x\right)\right)} \]

    if -6.4999999999999997e-4 < t < 9.5e15

    1. Initial program 98.2%

      \[x \cdot e^{y \cdot \left(\log z - t\right) + a \cdot \left(\log \left(1 - z\right) - b\right)} \]
    2. Taylor expanded in b around inf 72.3%

      \[\leadsto x \cdot e^{\color{blue}{-1 \cdot \left(a \cdot b\right)}} \]
    3. Step-by-step derivation
      1. associate-*r*72.3%

        \[\leadsto x \cdot e^{\color{blue}{\left(-1 \cdot a\right) \cdot b}} \]
      2. neg-mul-172.3%

        \[\leadsto x \cdot e^{\color{blue}{\left(-a\right)} \cdot b} \]
      3. *-commutative72.3%

        \[\leadsto x \cdot e^{\color{blue}{b \cdot \left(-a\right)}} \]
    4. Simplified72.3%

      \[\leadsto x \cdot e^{\color{blue}{b \cdot \left(-a\right)}} \]
    5. Taylor expanded in b around 0 44.0%

      \[\leadsto x \cdot \color{blue}{\left(1 + \left(0.5 \cdot \left({a}^{2} \cdot {b}^{2}\right) + -1 \cdot \left(a \cdot b\right)\right)\right)} \]
    6. Step-by-step derivation
      1. mul-1-neg44.0%

        \[\leadsto x \cdot \left(1 + \left(0.5 \cdot \left({a}^{2} \cdot {b}^{2}\right) + \color{blue}{\left(-a \cdot b\right)}\right)\right) \]
      2. unsub-neg44.0%

        \[\leadsto x \cdot \left(1 + \color{blue}{\left(0.5 \cdot \left({a}^{2} \cdot {b}^{2}\right) - a \cdot b\right)}\right) \]
      3. associate-*r*44.0%

        \[\leadsto x \cdot \left(1 + \left(\color{blue}{\left(0.5 \cdot {a}^{2}\right) \cdot {b}^{2}} - a \cdot b\right)\right) \]
      4. unpow244.0%

        \[\leadsto x \cdot \left(1 + \left(\left(0.5 \cdot {a}^{2}\right) \cdot \color{blue}{\left(b \cdot b\right)} - a \cdot b\right)\right) \]
      5. associate-*r*44.3%

        \[\leadsto x \cdot \left(1 + \left(\color{blue}{\left(\left(0.5 \cdot {a}^{2}\right) \cdot b\right) \cdot b} - a \cdot b\right)\right) \]
      6. distribute-rgt-out--44.4%

        \[\leadsto x \cdot \left(1 + \color{blue}{b \cdot \left(\left(0.5 \cdot {a}^{2}\right) \cdot b - a\right)}\right) \]
      7. *-commutative44.4%

        \[\leadsto x \cdot \left(1 + b \cdot \left(\color{blue}{\left({a}^{2} \cdot 0.5\right)} \cdot b - a\right)\right) \]
      8. unpow244.4%

        \[\leadsto x \cdot \left(1 + b \cdot \left(\left(\color{blue}{\left(a \cdot a\right)} \cdot 0.5\right) \cdot b - a\right)\right) \]
      9. associate-*l*44.4%

        \[\leadsto x \cdot \left(1 + b \cdot \left(\color{blue}{\left(a \cdot \left(a \cdot 0.5\right)\right)} \cdot b - a\right)\right) \]
    7. Simplified44.4%

      \[\leadsto x \cdot \color{blue}{\left(1 + b \cdot \left(\left(a \cdot \left(a \cdot 0.5\right)\right) \cdot b - a\right)\right)} \]
    8. Taylor expanded in b around inf 43.9%

      \[\leadsto x \cdot \left(1 + \color{blue}{0.5 \cdot \left({a}^{2} \cdot {b}^{2}\right)}\right) \]
    9. Step-by-step derivation
      1. associate-*r*43.9%

        \[\leadsto x \cdot \left(1 + \color{blue}{\left(0.5 \cdot {a}^{2}\right) \cdot {b}^{2}}\right) \]
      2. *-commutative43.9%

        \[\leadsto x \cdot \left(1 + \color{blue}{\left({a}^{2} \cdot 0.5\right)} \cdot {b}^{2}\right) \]
      3. unpow243.9%

        \[\leadsto x \cdot \left(1 + \left(\color{blue}{\left(a \cdot a\right)} \cdot 0.5\right) \cdot {b}^{2}\right) \]
      4. associate-*l*43.9%

        \[\leadsto x \cdot \left(1 + \color{blue}{\left(a \cdot \left(a \cdot 0.5\right)\right)} \cdot {b}^{2}\right) \]
      5. associate-*l*45.9%

        \[\leadsto x \cdot \left(1 + \color{blue}{a \cdot \left(\left(a \cdot 0.5\right) \cdot {b}^{2}\right)}\right) \]
      6. unpow245.9%

        \[\leadsto x \cdot \left(1 + a \cdot \left(\left(a \cdot 0.5\right) \cdot \color{blue}{\left(b \cdot b\right)}\right)\right) \]
    10. Simplified45.9%

      \[\leadsto x \cdot \left(1 + \color{blue}{a \cdot \left(\left(a \cdot 0.5\right) \cdot \left(b \cdot b\right)\right)}\right) \]

    if 7.4000000000000002e245 < t < 6.79999999999999967e276

    1. Initial program 75.0%

      \[x \cdot e^{y \cdot \left(\log z - t\right) + a \cdot \left(\log \left(1 - z\right) - b\right)} \]
    2. Taylor expanded in t around inf 100.0%

      \[\leadsto x \cdot e^{\color{blue}{-1 \cdot \left(y \cdot t\right)}} \]
    3. Step-by-step derivation
      1. mul-1-neg100.0%

        \[\leadsto x \cdot e^{\color{blue}{-y \cdot t}} \]
      2. distribute-rgt-neg-out100.0%

        \[\leadsto x \cdot e^{\color{blue}{y \cdot \left(-t\right)}} \]
    4. Simplified100.0%

      \[\leadsto x \cdot e^{\color{blue}{y \cdot \left(-t\right)}} \]
    5. Taylor expanded in y around 0 100.0%

      \[\leadsto \color{blue}{0.5 \cdot \left({y}^{2} \cdot \left({t}^{2} \cdot x\right)\right) + \left(-1 \cdot \left(y \cdot \left(t \cdot x\right)\right) + x\right)} \]
    6. Step-by-step derivation
      1. associate-+r+100.0%

        \[\leadsto \color{blue}{\left(0.5 \cdot \left({y}^{2} \cdot \left({t}^{2} \cdot x\right)\right) + -1 \cdot \left(y \cdot \left(t \cdot x\right)\right)\right) + x} \]
      2. +-commutative100.0%

        \[\leadsto \color{blue}{x + \left(0.5 \cdot \left({y}^{2} \cdot \left({t}^{2} \cdot x\right)\right) + -1 \cdot \left(y \cdot \left(t \cdot x\right)\right)\right)} \]
      3. mul-1-neg100.0%

        \[\leadsto x + \left(0.5 \cdot \left({y}^{2} \cdot \left({t}^{2} \cdot x\right)\right) + \color{blue}{\left(-y \cdot \left(t \cdot x\right)\right)}\right) \]
      4. unsub-neg100.0%

        \[\leadsto x + \color{blue}{\left(0.5 \cdot \left({y}^{2} \cdot \left({t}^{2} \cdot x\right)\right) - y \cdot \left(t \cdot x\right)\right)} \]
      5. associate-*r*100.0%

        \[\leadsto x + \left(0.5 \cdot \color{blue}{\left(\left({y}^{2} \cdot {t}^{2}\right) \cdot x\right)} - y \cdot \left(t \cdot x\right)\right) \]
      6. associate-*r*100.0%

        \[\leadsto x + \left(\color{blue}{\left(0.5 \cdot \left({y}^{2} \cdot {t}^{2}\right)\right) \cdot x} - y \cdot \left(t \cdot x\right)\right) \]
      7. associate-*r*100.0%

        \[\leadsto x + \left(\left(0.5 \cdot \left({y}^{2} \cdot {t}^{2}\right)\right) \cdot x - \color{blue}{\left(y \cdot t\right) \cdot x}\right) \]
      8. distribute-rgt-out--100.0%

        \[\leadsto x + \color{blue}{x \cdot \left(0.5 \cdot \left({y}^{2} \cdot {t}^{2}\right) - y \cdot t\right)} \]
      9. unpow2100.0%

        \[\leadsto x + x \cdot \left(0.5 \cdot \left(\color{blue}{\left(y \cdot y\right)} \cdot {t}^{2}\right) - y \cdot t\right) \]
      10. unpow2100.0%

        \[\leadsto x + x \cdot \left(0.5 \cdot \left(\left(y \cdot y\right) \cdot \color{blue}{\left(t \cdot t\right)}\right) - y \cdot t\right) \]
      11. unswap-sqr88.6%

        \[\leadsto x + x \cdot \left(0.5 \cdot \color{blue}{\left(\left(y \cdot t\right) \cdot \left(y \cdot t\right)\right)} - y \cdot t\right) \]
    7. Simplified88.6%

      \[\leadsto \color{blue}{x + x \cdot \left(0.5 \cdot \left(\left(y \cdot t\right) \cdot \left(y \cdot t\right)\right) - y \cdot t\right)} \]
    8. Taylor expanded in y around inf 100.0%

      \[\leadsto x + \color{blue}{0.5 \cdot \left({y}^{2} \cdot \left({t}^{2} \cdot x\right)\right)} \]
    9. Step-by-step derivation
      1. unpow2100.0%

        \[\leadsto x + 0.5 \cdot \left(\color{blue}{\left(y \cdot y\right)} \cdot \left({t}^{2} \cdot x\right)\right) \]
      2. *-commutative100.0%

        \[\leadsto x + 0.5 \cdot \left(\left(y \cdot y\right) \cdot \color{blue}{\left(x \cdot {t}^{2}\right)}\right) \]
      3. unpow2100.0%

        \[\leadsto x + 0.5 \cdot \left(\left(y \cdot y\right) \cdot \left(x \cdot \color{blue}{\left(t \cdot t\right)}\right)\right) \]
    10. Simplified100.0%

      \[\leadsto x + \color{blue}{0.5 \cdot \left(\left(y \cdot y\right) \cdot \left(x \cdot \left(t \cdot t\right)\right)\right)} \]
  3. Recombined 4 regimes into one program.
  4. Final simplification47.2%

    \[\leadsto \begin{array}{l} \mathbf{if}\;t \leq -1.9 \cdot 10^{+137}:\\ \;\;\;\;x - t \cdot \left(x \cdot y\right)\\ \mathbf{elif}\;t \leq -0.00065:\\ \;\;\;\;a \cdot \left(\left(a \cdot 0.5\right) \cdot \left(x \cdot \left(b \cdot b\right)\right)\right)\\ \mathbf{elif}\;t \leq 9.5 \cdot 10^{+15}:\\ \;\;\;\;x \cdot \left(1 + a \cdot \left(\left(a \cdot 0.5\right) \cdot \left(b \cdot b\right)\right)\right)\\ \mathbf{elif}\;t \leq 7.4 \cdot 10^{+245} \lor \neg \left(t \leq 6.8 \cdot 10^{+276}\right):\\ \;\;\;\;a \cdot \left(\left(a \cdot 0.5\right) \cdot \left(x \cdot \left(b \cdot b\right)\right)\right)\\ \mathbf{else}:\\ \;\;\;\;x + 0.5 \cdot \left(\left(y \cdot y\right) \cdot \left(x \cdot \left(t \cdot t\right)\right)\right)\\ \end{array} \]

Alternative 9: 42.1% accurate, 13.5× speedup?

\[\begin{array}{l} \mathbf{if}\;a \leq -1.25 \cdot 10^{+48}:\\ \;\;\;\;x \cdot \left(1 + b \cdot \left(b \cdot \left(a \cdot \left(a \cdot 0.5\right)\right) - a\right)\right)\\ \mathbf{elif}\;a \leq -8 \cdot 10^{-133} \lor \neg \left(a \leq -3.4 \cdot 10^{-295}\right) \land a \leq 1.05 \cdot 10^{+116}:\\ \;\;\;\;x + x \cdot \left(\left(y \cdot t\right) \cdot \left(y \cdot \left(t \cdot 0.5\right) + -1\right)\right)\\ \mathbf{else}:\\ \;\;\;\;a \cdot \left(\left(a \cdot 0.5\right) \cdot \left(x \cdot \left(b \cdot b\right)\right)\right)\\ \end{array} \]
Derivation
  1. Split input into 3 regimes
  2. if a < -1.24999999999999993e48

    1. Initial program 89.0%

      \[x \cdot e^{y \cdot \left(\log z - t\right) + a \cdot \left(\log \left(1 - z\right) - b\right)} \]
    2. Taylor expanded in b around inf 72.7%

      \[\leadsto x \cdot e^{\color{blue}{-1 \cdot \left(a \cdot b\right)}} \]
    3. Step-by-step derivation
      1. associate-*r*72.7%

        \[\leadsto x \cdot e^{\color{blue}{\left(-1 \cdot a\right) \cdot b}} \]
      2. neg-mul-172.7%

        \[\leadsto x \cdot e^{\color{blue}{\left(-a\right)} \cdot b} \]
      3. *-commutative72.7%

        \[\leadsto x \cdot e^{\color{blue}{b \cdot \left(-a\right)}} \]
    4. Simplified72.7%

      \[\leadsto x \cdot e^{\color{blue}{b \cdot \left(-a\right)}} \]
    5. Taylor expanded in b around 0 45.4%

      \[\leadsto x \cdot \color{blue}{\left(1 + \left(0.5 \cdot \left({a}^{2} \cdot {b}^{2}\right) + -1 \cdot \left(a \cdot b\right)\right)\right)} \]
    6. Step-by-step derivation
      1. mul-1-neg45.4%

        \[\leadsto x \cdot \left(1 + \left(0.5 \cdot \left({a}^{2} \cdot {b}^{2}\right) + \color{blue}{\left(-a \cdot b\right)}\right)\right) \]
      2. unsub-neg45.4%

        \[\leadsto x \cdot \left(1 + \color{blue}{\left(0.5 \cdot \left({a}^{2} \cdot {b}^{2}\right) - a \cdot b\right)}\right) \]
      3. associate-*r*45.4%

        \[\leadsto x \cdot \left(1 + \left(\color{blue}{\left(0.5 \cdot {a}^{2}\right) \cdot {b}^{2}} - a \cdot b\right)\right) \]
      4. unpow245.4%

        \[\leadsto x \cdot \left(1 + \left(\left(0.5 \cdot {a}^{2}\right) \cdot \color{blue}{\left(b \cdot b\right)} - a \cdot b\right)\right) \]
      5. associate-*r*54.7%

        \[\leadsto x \cdot \left(1 + \left(\color{blue}{\left(\left(0.5 \cdot {a}^{2}\right) \cdot b\right) \cdot b} - a \cdot b\right)\right) \]
      6. distribute-rgt-out--58.5%

        \[\leadsto x \cdot \left(1 + \color{blue}{b \cdot \left(\left(0.5 \cdot {a}^{2}\right) \cdot b - a\right)}\right) \]
      7. *-commutative58.5%

        \[\leadsto x \cdot \left(1 + b \cdot \left(\color{blue}{\left({a}^{2} \cdot 0.5\right)} \cdot b - a\right)\right) \]
      8. unpow258.5%

        \[\leadsto x \cdot \left(1 + b \cdot \left(\left(\color{blue}{\left(a \cdot a\right)} \cdot 0.5\right) \cdot b - a\right)\right) \]
      9. associate-*l*58.5%

        \[\leadsto x \cdot \left(1 + b \cdot \left(\color{blue}{\left(a \cdot \left(a \cdot 0.5\right)\right)} \cdot b - a\right)\right) \]
    7. Simplified58.5%

      \[\leadsto x \cdot \color{blue}{\left(1 + b \cdot \left(\left(a \cdot \left(a \cdot 0.5\right)\right) \cdot b - a\right)\right)} \]

    if -1.24999999999999993e48 < a < -8.0000000000000005e-133 or -3.40000000000000007e-295 < a < 1.0500000000000001e116

    1. Initial program 100.0%

      \[x \cdot e^{y \cdot \left(\log z - t\right) + a \cdot \left(\log \left(1 - z\right) - b\right)} \]
    2. Taylor expanded in t around inf 68.0%

      \[\leadsto x \cdot e^{\color{blue}{-1 \cdot \left(y \cdot t\right)}} \]
    3. Step-by-step derivation
      1. mul-1-neg68.0%

        \[\leadsto x \cdot e^{\color{blue}{-y \cdot t}} \]
      2. distribute-rgt-neg-out68.0%

        \[\leadsto x \cdot e^{\color{blue}{y \cdot \left(-t\right)}} \]
    4. Simplified68.0%

      \[\leadsto x \cdot e^{\color{blue}{y \cdot \left(-t\right)}} \]
    5. Taylor expanded in y around 0 36.1%

      \[\leadsto \color{blue}{0.5 \cdot \left({y}^{2} \cdot \left({t}^{2} \cdot x\right)\right) + \left(-1 \cdot \left(y \cdot \left(t \cdot x\right)\right) + x\right)} \]
    6. Step-by-step derivation
      1. associate-+r+36.1%

        \[\leadsto \color{blue}{\left(0.5 \cdot \left({y}^{2} \cdot \left({t}^{2} \cdot x\right)\right) + -1 \cdot \left(y \cdot \left(t \cdot x\right)\right)\right) + x} \]
      2. +-commutative36.1%

        \[\leadsto \color{blue}{x + \left(0.5 \cdot \left({y}^{2} \cdot \left({t}^{2} \cdot x\right)\right) + -1 \cdot \left(y \cdot \left(t \cdot x\right)\right)\right)} \]
      3. mul-1-neg36.1%

        \[\leadsto x + \left(0.5 \cdot \left({y}^{2} \cdot \left({t}^{2} \cdot x\right)\right) + \color{blue}{\left(-y \cdot \left(t \cdot x\right)\right)}\right) \]
      4. unsub-neg36.1%

        \[\leadsto x + \color{blue}{\left(0.5 \cdot \left({y}^{2} \cdot \left({t}^{2} \cdot x\right)\right) - y \cdot \left(t \cdot x\right)\right)} \]
      5. associate-*r*38.9%

        \[\leadsto x + \left(0.5 \cdot \color{blue}{\left(\left({y}^{2} \cdot {t}^{2}\right) \cdot x\right)} - y \cdot \left(t \cdot x\right)\right) \]
      6. associate-*r*38.9%

        \[\leadsto x + \left(\color{blue}{\left(0.5 \cdot \left({y}^{2} \cdot {t}^{2}\right)\right) \cdot x} - y \cdot \left(t \cdot x\right)\right) \]
      7. associate-*r*39.6%

        \[\leadsto x + \left(\left(0.5 \cdot \left({y}^{2} \cdot {t}^{2}\right)\right) \cdot x - \color{blue}{\left(y \cdot t\right) \cdot x}\right) \]
      8. distribute-rgt-out--39.6%

        \[\leadsto x + \color{blue}{x \cdot \left(0.5 \cdot \left({y}^{2} \cdot {t}^{2}\right) - y \cdot t\right)} \]
      9. unpow239.6%

        \[\leadsto x + x \cdot \left(0.5 \cdot \left(\color{blue}{\left(y \cdot y\right)} \cdot {t}^{2}\right) - y \cdot t\right) \]
      10. unpow239.6%

        \[\leadsto x + x \cdot \left(0.5 \cdot \left(\left(y \cdot y\right) \cdot \color{blue}{\left(t \cdot t\right)}\right) - y \cdot t\right) \]
      11. unswap-sqr41.7%

        \[\leadsto x + x \cdot \left(0.5 \cdot \color{blue}{\left(\left(y \cdot t\right) \cdot \left(y \cdot t\right)\right)} - y \cdot t\right) \]
    7. Simplified41.7%

      \[\leadsto \color{blue}{x + x \cdot \left(0.5 \cdot \left(\left(y \cdot t\right) \cdot \left(y \cdot t\right)\right) - y \cdot t\right)} \]
    8. Taylor expanded in x around 0 39.6%

      \[\leadsto x + \color{blue}{\left(0.5 \cdot \left({y}^{2} \cdot {t}^{2}\right) - y \cdot t\right) \cdot x} \]
    9. Step-by-step derivation
      1. *-commutative39.6%

        \[\leadsto x + \color{blue}{x \cdot \left(0.5 \cdot \left({y}^{2} \cdot {t}^{2}\right) - y \cdot t\right)} \]
      2. sub-neg39.6%

        \[\leadsto x + x \cdot \color{blue}{\left(0.5 \cdot \left({y}^{2} \cdot {t}^{2}\right) + \left(-y \cdot t\right)\right)} \]
      3. fma-def39.6%

        \[\leadsto x + x \cdot \color{blue}{\mathsf{fma}\left(0.5, {y}^{2} \cdot {t}^{2}, -y \cdot t\right)} \]
      4. unpow239.6%

        \[\leadsto x + x \cdot \mathsf{fma}\left(0.5, \color{blue}{\left(y \cdot y\right)} \cdot {t}^{2}, -y \cdot t\right) \]
      5. unpow239.6%

        \[\leadsto x + x \cdot \mathsf{fma}\left(0.5, \left(y \cdot y\right) \cdot \color{blue}{\left(t \cdot t\right)}, -y \cdot t\right) \]
      6. swap-sqr41.7%

        \[\leadsto x + x \cdot \mathsf{fma}\left(0.5, \color{blue}{\left(y \cdot t\right) \cdot \left(y \cdot t\right)}, -y \cdot t\right) \]
      7. unpow241.7%

        \[\leadsto x + x \cdot \mathsf{fma}\left(0.5, \color{blue}{{\left(y \cdot t\right)}^{2}}, -y \cdot t\right) \]
      8. fma-def41.7%

        \[\leadsto x + x \cdot \color{blue}{\left(0.5 \cdot {\left(y \cdot t\right)}^{2} + \left(-y \cdot t\right)\right)} \]
      9. unpow241.7%

        \[\leadsto x + x \cdot \left(0.5 \cdot \color{blue}{\left(\left(y \cdot t\right) \cdot \left(y \cdot t\right)\right)} + \left(-y \cdot t\right)\right) \]
      10. associate-*r*41.7%

        \[\leadsto x + x \cdot \left(\color{blue}{\left(0.5 \cdot \left(y \cdot t\right)\right) \cdot \left(y \cdot t\right)} + \left(-y \cdot t\right)\right) \]
      11. neg-mul-141.7%

        \[\leadsto x + x \cdot \left(\left(0.5 \cdot \left(y \cdot t\right)\right) \cdot \left(y \cdot t\right) + \color{blue}{-1 \cdot \left(y \cdot t\right)}\right) \]
      12. distribute-rgt-out41.8%

        \[\leadsto x + x \cdot \color{blue}{\left(\left(y \cdot t\right) \cdot \left(0.5 \cdot \left(y \cdot t\right) + -1\right)\right)} \]
      13. *-commutative41.8%

        \[\leadsto x + x \cdot \left(\left(y \cdot t\right) \cdot \left(\color{blue}{\left(y \cdot t\right) \cdot 0.5} + -1\right)\right) \]
      14. associate-*l*41.8%

        \[\leadsto x + x \cdot \left(\left(y \cdot t\right) \cdot \left(\color{blue}{y \cdot \left(t \cdot 0.5\right)} + -1\right)\right) \]
    10. Simplified41.8%

      \[\leadsto x + \color{blue}{x \cdot \left(\left(y \cdot t\right) \cdot \left(y \cdot \left(t \cdot 0.5\right) + -1\right)\right)} \]

    if -8.0000000000000005e-133 < a < -3.40000000000000007e-295 or 1.0500000000000001e116 < a

    1. Initial program 91.9%

      \[x \cdot e^{y \cdot \left(\log z - t\right) + a \cdot \left(\log \left(1 - z\right) - b\right)} \]
    2. Taylor expanded in b around inf 57.7%

      \[\leadsto x \cdot e^{\color{blue}{-1 \cdot \left(a \cdot b\right)}} \]
    3. Step-by-step derivation
      1. associate-*r*57.7%

        \[\leadsto x \cdot e^{\color{blue}{\left(-1 \cdot a\right) \cdot b}} \]
      2. neg-mul-157.7%

        \[\leadsto x \cdot e^{\color{blue}{\left(-a\right)} \cdot b} \]
      3. *-commutative57.7%

        \[\leadsto x \cdot e^{\color{blue}{b \cdot \left(-a\right)}} \]
    4. Simplified57.7%

      \[\leadsto x \cdot e^{\color{blue}{b \cdot \left(-a\right)}} \]
    5. Taylor expanded in b around 0 30.3%

      \[\leadsto x \cdot \color{blue}{\left(1 + \left(0.5 \cdot \left({a}^{2} \cdot {b}^{2}\right) + -1 \cdot \left(a \cdot b\right)\right)\right)} \]
    6. Step-by-step derivation
      1. mul-1-neg30.3%

        \[\leadsto x \cdot \left(1 + \left(0.5 \cdot \left({a}^{2} \cdot {b}^{2}\right) + \color{blue}{\left(-a \cdot b\right)}\right)\right) \]
      2. unsub-neg30.3%

        \[\leadsto x \cdot \left(1 + \color{blue}{\left(0.5 \cdot \left({a}^{2} \cdot {b}^{2}\right) - a \cdot b\right)}\right) \]
      3. associate-*r*30.3%

        \[\leadsto x \cdot \left(1 + \left(\color{blue}{\left(0.5 \cdot {a}^{2}\right) \cdot {b}^{2}} - a \cdot b\right)\right) \]
      4. unpow230.3%

        \[\leadsto x \cdot \left(1 + \left(\left(0.5 \cdot {a}^{2}\right) \cdot \color{blue}{\left(b \cdot b\right)} - a \cdot b\right)\right) \]
      5. associate-*r*27.9%

        \[\leadsto x \cdot \left(1 + \left(\color{blue}{\left(\left(0.5 \cdot {a}^{2}\right) \cdot b\right) \cdot b} - a \cdot b\right)\right) \]
      6. distribute-rgt-out--28.0%

        \[\leadsto x \cdot \left(1 + \color{blue}{b \cdot \left(\left(0.5 \cdot {a}^{2}\right) \cdot b - a\right)}\right) \]
      7. *-commutative28.0%

        \[\leadsto x \cdot \left(1 + b \cdot \left(\color{blue}{\left({a}^{2} \cdot 0.5\right)} \cdot b - a\right)\right) \]
      8. unpow228.0%

        \[\leadsto x \cdot \left(1 + b \cdot \left(\left(\color{blue}{\left(a \cdot a\right)} \cdot 0.5\right) \cdot b - a\right)\right) \]
      9. associate-*l*28.0%

        \[\leadsto x \cdot \left(1 + b \cdot \left(\color{blue}{\left(a \cdot \left(a \cdot 0.5\right)\right)} \cdot b - a\right)\right) \]
    7. Simplified28.0%

      \[\leadsto x \cdot \color{blue}{\left(1 + b \cdot \left(\left(a \cdot \left(a \cdot 0.5\right)\right) \cdot b - a\right)\right)} \]
    8. Taylor expanded in b around inf 37.7%

      \[\leadsto \color{blue}{0.5 \cdot \left({a}^{2} \cdot \left({b}^{2} \cdot x\right)\right)} \]
    9. Step-by-step derivation
      1. associate-*r*37.7%

        \[\leadsto \color{blue}{\left(0.5 \cdot {a}^{2}\right) \cdot \left({b}^{2} \cdot x\right)} \]
      2. *-commutative37.7%

        \[\leadsto \color{blue}{\left({a}^{2} \cdot 0.5\right)} \cdot \left({b}^{2} \cdot x\right) \]
      3. unpow237.7%

        \[\leadsto \left(\color{blue}{\left(a \cdot a\right)} \cdot 0.5\right) \cdot \left({b}^{2} \cdot x\right) \]
      4. associate-*l*37.7%

        \[\leadsto \color{blue}{\left(a \cdot \left(a \cdot 0.5\right)\right)} \cdot \left({b}^{2} \cdot x\right) \]
      5. associate-*l*53.7%

        \[\leadsto \color{blue}{a \cdot \left(\left(a \cdot 0.5\right) \cdot \left({b}^{2} \cdot x\right)\right)} \]
      6. unpow253.7%

        \[\leadsto a \cdot \left(\left(a \cdot 0.5\right) \cdot \left(\color{blue}{\left(b \cdot b\right)} \cdot x\right)\right) \]
    10. Simplified53.7%

      \[\leadsto \color{blue}{a \cdot \left(\left(a \cdot 0.5\right) \cdot \left(\left(b \cdot b\right) \cdot x\right)\right)} \]
  3. Recombined 3 regimes into one program.
  4. Final simplification48.3%

    \[\leadsto \begin{array}{l} \mathbf{if}\;a \leq -1.25 \cdot 10^{+48}:\\ \;\;\;\;x \cdot \left(1 + b \cdot \left(b \cdot \left(a \cdot \left(a \cdot 0.5\right)\right) - a\right)\right)\\ \mathbf{elif}\;a \leq -8 \cdot 10^{-133} \lor \neg \left(a \leq -3.4 \cdot 10^{-295}\right) \land a \leq 1.05 \cdot 10^{+116}:\\ \;\;\;\;x + x \cdot \left(\left(y \cdot t\right) \cdot \left(y \cdot \left(t \cdot 0.5\right) + -1\right)\right)\\ \mathbf{else}:\\ \;\;\;\;a \cdot \left(\left(a \cdot 0.5\right) \cdot \left(x \cdot \left(b \cdot b\right)\right)\right)\\ \end{array} \]

Alternative 10: 35.6% accurate, 16.3× speedup?

\[\begin{array}{l} \mathbf{if}\;a \leq -2.05 \cdot 10^{+49} \lor \neg \left(a \leq -1.15 \cdot 10^{-77} \lor \neg \left(a \leq -3.2 \cdot 10^{-295}\right) \land a \leq 1.2 \cdot 10^{+116}\right):\\ \;\;\;\;a \cdot \left(\left(a \cdot 0.5\right) \cdot \left(x \cdot \left(b \cdot b\right)\right)\right)\\ \mathbf{else}:\\ \;\;\;\;x - t \cdot \left(x \cdot y\right)\\ \end{array} \]
Derivation
  1. Split input into 2 regimes
  2. if a < -2.05e49 or -1.14999999999999999e-77 < a < -3.2e-295 or 1.2e116 < a

    1. Initial program 91.2%

      \[x \cdot e^{y \cdot \left(\log z - t\right) + a \cdot \left(\log \left(1 - z\right) - b\right)} \]
    2. Taylor expanded in b around inf 64.3%

      \[\leadsto x \cdot e^{\color{blue}{-1 \cdot \left(a \cdot b\right)}} \]
    3. Step-by-step derivation
      1. associate-*r*64.3%

        \[\leadsto x \cdot e^{\color{blue}{\left(-1 \cdot a\right) \cdot b}} \]
      2. neg-mul-164.3%

        \[\leadsto x \cdot e^{\color{blue}{\left(-a\right)} \cdot b} \]
      3. *-commutative64.3%

        \[\leadsto x \cdot e^{\color{blue}{b \cdot \left(-a\right)}} \]
    4. Simplified64.3%

      \[\leadsto x \cdot e^{\color{blue}{b \cdot \left(-a\right)}} \]
    5. Taylor expanded in b around 0 37.1%

      \[\leadsto x \cdot \color{blue}{\left(1 + \left(0.5 \cdot \left({a}^{2} \cdot {b}^{2}\right) + -1 \cdot \left(a \cdot b\right)\right)\right)} \]
    6. Step-by-step derivation
      1. mul-1-neg37.1%

        \[\leadsto x \cdot \left(1 + \left(0.5 \cdot \left({a}^{2} \cdot {b}^{2}\right) + \color{blue}{\left(-a \cdot b\right)}\right)\right) \]
      2. unsub-neg37.1%

        \[\leadsto x \cdot \left(1 + \color{blue}{\left(0.5 \cdot \left({a}^{2} \cdot {b}^{2}\right) - a \cdot b\right)}\right) \]
      3. associate-*r*37.1%

        \[\leadsto x \cdot \left(1 + \left(\color{blue}{\left(0.5 \cdot {a}^{2}\right) \cdot {b}^{2}} - a \cdot b\right)\right) \]
      4. unpow237.1%

        \[\leadsto x \cdot \left(1 + \left(\left(0.5 \cdot {a}^{2}\right) \cdot \color{blue}{\left(b \cdot b\right)} - a \cdot b\right)\right) \]
      5. associate-*r*38.3%

        \[\leadsto x \cdot \left(1 + \left(\color{blue}{\left(\left(0.5 \cdot {a}^{2}\right) \cdot b\right) \cdot b} - a \cdot b\right)\right) \]
      6. distribute-rgt-out--40.0%

        \[\leadsto x \cdot \left(1 + \color{blue}{b \cdot \left(\left(0.5 \cdot {a}^{2}\right) \cdot b - a\right)}\right) \]
      7. *-commutative40.0%

        \[\leadsto x \cdot \left(1 + b \cdot \left(\color{blue}{\left({a}^{2} \cdot 0.5\right)} \cdot b - a\right)\right) \]
      8. unpow240.0%

        \[\leadsto x \cdot \left(1 + b \cdot \left(\left(\color{blue}{\left(a \cdot a\right)} \cdot 0.5\right) \cdot b - a\right)\right) \]
      9. associate-*l*40.0%

        \[\leadsto x \cdot \left(1 + b \cdot \left(\color{blue}{\left(a \cdot \left(a \cdot 0.5\right)\right)} \cdot b - a\right)\right) \]
    7. Simplified40.0%

      \[\leadsto x \cdot \color{blue}{\left(1 + b \cdot \left(\left(a \cdot \left(a \cdot 0.5\right)\right) \cdot b - a\right)\right)} \]
    8. Taylor expanded in b around inf 39.6%

      \[\leadsto \color{blue}{0.5 \cdot \left({a}^{2} \cdot \left({b}^{2} \cdot x\right)\right)} \]
    9. Step-by-step derivation
      1. associate-*r*39.6%

        \[\leadsto \color{blue}{\left(0.5 \cdot {a}^{2}\right) \cdot \left({b}^{2} \cdot x\right)} \]
      2. *-commutative39.6%

        \[\leadsto \color{blue}{\left({a}^{2} \cdot 0.5\right)} \cdot \left({b}^{2} \cdot x\right) \]
      3. unpow239.6%

        \[\leadsto \left(\color{blue}{\left(a \cdot a\right)} \cdot 0.5\right) \cdot \left({b}^{2} \cdot x\right) \]
      4. associate-*l*39.6%

        \[\leadsto \color{blue}{\left(a \cdot \left(a \cdot 0.5\right)\right)} \cdot \left({b}^{2} \cdot x\right) \]
      5. associate-*l*45.6%

        \[\leadsto \color{blue}{a \cdot \left(\left(a \cdot 0.5\right) \cdot \left({b}^{2} \cdot x\right)\right)} \]
      6. unpow245.6%

        \[\leadsto a \cdot \left(\left(a \cdot 0.5\right) \cdot \left(\color{blue}{\left(b \cdot b\right)} \cdot x\right)\right) \]
    10. Simplified45.6%

      \[\leadsto \color{blue}{a \cdot \left(\left(a \cdot 0.5\right) \cdot \left(\left(b \cdot b\right) \cdot x\right)\right)} \]

    if -2.05e49 < a < -1.14999999999999999e-77 or -3.2e-295 < a < 1.2e116

    1. Initial program 100.0%

      \[x \cdot e^{y \cdot \left(\log z - t\right) + a \cdot \left(\log \left(1 - z\right) - b\right)} \]
    2. Taylor expanded in t around inf 69.0%

      \[\leadsto x \cdot e^{\color{blue}{-1 \cdot \left(y \cdot t\right)}} \]
    3. Step-by-step derivation
      1. mul-1-neg69.0%

        \[\leadsto x \cdot e^{\color{blue}{-y \cdot t}} \]
      2. distribute-rgt-neg-out69.0%

        \[\leadsto x \cdot e^{\color{blue}{y \cdot \left(-t\right)}} \]
    4. Simplified69.0%

      \[\leadsto x \cdot e^{\color{blue}{y \cdot \left(-t\right)}} \]
    5. Taylor expanded in y around 0 36.0%

      \[\leadsto \color{blue}{-1 \cdot \left(y \cdot \left(t \cdot x\right)\right) + x} \]
    6. Step-by-step derivation
      1. +-commutative36.0%

        \[\leadsto \color{blue}{x + -1 \cdot \left(y \cdot \left(t \cdot x\right)\right)} \]
      2. mul-1-neg36.0%

        \[\leadsto x + \color{blue}{\left(-y \cdot \left(t \cdot x\right)\right)} \]
      3. unsub-neg36.0%

        \[\leadsto \color{blue}{x - y \cdot \left(t \cdot x\right)} \]
    7. Simplified36.0%

      \[\leadsto \color{blue}{x - y \cdot \left(t \cdot x\right)} \]
    8. Taylor expanded in x around 0 38.9%

      \[\leadsto \color{blue}{\left(1 - y \cdot t\right) \cdot x} \]
    9. Step-by-step derivation
      1. *-commutative38.9%

        \[\leadsto \color{blue}{x \cdot \left(1 - y \cdot t\right)} \]
      2. distribute-rgt-out--38.9%

        \[\leadsto \color{blue}{1 \cdot x - \left(y \cdot t\right) \cdot x} \]
      3. associate-*r*36.0%

        \[\leadsto 1 \cdot x - \color{blue}{y \cdot \left(t \cdot x\right)} \]
      4. *-commutative36.0%

        \[\leadsto 1 \cdot x - y \cdot \color{blue}{\left(x \cdot t\right)} \]
      5. *-lft-identity36.0%

        \[\leadsto \color{blue}{x} - y \cdot \left(x \cdot t\right) \]
      6. *-commutative36.0%

        \[\leadsto x - \color{blue}{\left(x \cdot t\right) \cdot y} \]
      7. *-commutative36.0%

        \[\leadsto x - \color{blue}{\left(t \cdot x\right)} \cdot y \]
      8. associate-*l*39.6%

        \[\leadsto x - \color{blue}{t \cdot \left(x \cdot y\right)} \]
    10. Simplified39.6%

      \[\leadsto \color{blue}{x - t \cdot \left(x \cdot y\right)} \]
  3. Recombined 2 regimes into one program.
  4. Final simplification42.6%

    \[\leadsto \begin{array}{l} \mathbf{if}\;a \leq -2.05 \cdot 10^{+49} \lor \neg \left(a \leq -1.15 \cdot 10^{-77} \lor \neg \left(a \leq -3.2 \cdot 10^{-295}\right) \land a \leq 1.2 \cdot 10^{+116}\right):\\ \;\;\;\;a \cdot \left(\left(a \cdot 0.5\right) \cdot \left(x \cdot \left(b \cdot b\right)\right)\right)\\ \mathbf{else}:\\ \;\;\;\;x - t \cdot \left(x \cdot y\right)\\ \end{array} \]

Alternative 11: 35.0% accurate, 16.4× speedup?

\[\begin{array}{l} \mathbf{if}\;a \leq -8 \cdot 10^{+48}:\\ \;\;\;\;x \cdot \left(\left(a \cdot b\right) \cdot \left(0.5 \cdot \left(a \cdot b\right)\right)\right)\\ \mathbf{elif}\;a \leq -1.42 \cdot 10^{-77} \lor \neg \left(a \leq -1.75 \cdot 10^{-297}\right) \land a \leq 1.15 \cdot 10^{+116}:\\ \;\;\;\;x - t \cdot \left(x \cdot y\right)\\ \mathbf{else}:\\ \;\;\;\;a \cdot \left(\left(a \cdot 0.5\right) \cdot \left(x \cdot \left(b \cdot b\right)\right)\right)\\ \end{array} \]
Derivation
  1. Split input into 3 regimes
  2. if a < -8.00000000000000035e48

    1. Initial program 89.0%

      \[x \cdot e^{y \cdot \left(\log z - t\right) + a \cdot \left(\log \left(1 - z\right) - b\right)} \]
    2. Taylor expanded in b around inf 72.7%

      \[\leadsto x \cdot e^{\color{blue}{-1 \cdot \left(a \cdot b\right)}} \]
    3. Step-by-step derivation
      1. associate-*r*72.7%

        \[\leadsto x \cdot e^{\color{blue}{\left(-1 \cdot a\right) \cdot b}} \]
      2. neg-mul-172.7%

        \[\leadsto x \cdot e^{\color{blue}{\left(-a\right)} \cdot b} \]
      3. *-commutative72.7%

        \[\leadsto x \cdot e^{\color{blue}{b \cdot \left(-a\right)}} \]
    4. Simplified72.7%

      \[\leadsto x \cdot e^{\color{blue}{b \cdot \left(-a\right)}} \]
    5. Taylor expanded in b around 0 45.4%

      \[\leadsto x \cdot \color{blue}{\left(1 + \left(0.5 \cdot \left({a}^{2} \cdot {b}^{2}\right) + -1 \cdot \left(a \cdot b\right)\right)\right)} \]
    6. Step-by-step derivation
      1. mul-1-neg45.4%

        \[\leadsto x \cdot \left(1 + \left(0.5 \cdot \left({a}^{2} \cdot {b}^{2}\right) + \color{blue}{\left(-a \cdot b\right)}\right)\right) \]
      2. unsub-neg45.4%

        \[\leadsto x \cdot \left(1 + \color{blue}{\left(0.5 \cdot \left({a}^{2} \cdot {b}^{2}\right) - a \cdot b\right)}\right) \]
      3. associate-*r*45.4%

        \[\leadsto x \cdot \left(1 + \left(\color{blue}{\left(0.5 \cdot {a}^{2}\right) \cdot {b}^{2}} - a \cdot b\right)\right) \]
      4. unpow245.4%

        \[\leadsto x \cdot \left(1 + \left(\left(0.5 \cdot {a}^{2}\right) \cdot \color{blue}{\left(b \cdot b\right)} - a \cdot b\right)\right) \]
      5. associate-*r*54.7%

        \[\leadsto x \cdot \left(1 + \left(\color{blue}{\left(\left(0.5 \cdot {a}^{2}\right) \cdot b\right) \cdot b} - a \cdot b\right)\right) \]
      6. distribute-rgt-out--58.5%

        \[\leadsto x \cdot \left(1 + \color{blue}{b \cdot \left(\left(0.5 \cdot {a}^{2}\right) \cdot b - a\right)}\right) \]
      7. *-commutative58.5%

        \[\leadsto x \cdot \left(1 + b \cdot \left(\color{blue}{\left({a}^{2} \cdot 0.5\right)} \cdot b - a\right)\right) \]
      8. unpow258.5%

        \[\leadsto x \cdot \left(1 + b \cdot \left(\left(\color{blue}{\left(a \cdot a\right)} \cdot 0.5\right) \cdot b - a\right)\right) \]
      9. associate-*l*58.5%

        \[\leadsto x \cdot \left(1 + b \cdot \left(\color{blue}{\left(a \cdot \left(a \cdot 0.5\right)\right)} \cdot b - a\right)\right) \]
    7. Simplified58.5%

      \[\leadsto x \cdot \color{blue}{\left(1 + b \cdot \left(\left(a \cdot \left(a \cdot 0.5\right)\right) \cdot b - a\right)\right)} \]
    8. Taylor expanded in b around inf 43.8%

      \[\leadsto \color{blue}{0.5 \cdot \left({a}^{2} \cdot \left({b}^{2} \cdot x\right)\right)} \]
    9. Step-by-step derivation
      1. associate-*r*43.8%

        \[\leadsto \color{blue}{\left(0.5 \cdot {a}^{2}\right) \cdot \left({b}^{2} \cdot x\right)} \]
      2. unpow243.8%

        \[\leadsto \left(0.5 \cdot \color{blue}{\left(a \cdot a\right)}\right) \cdot \left({b}^{2} \cdot x\right) \]
      3. unpow243.8%

        \[\leadsto \left(0.5 \cdot \left(a \cdot a\right)\right) \cdot \left(\color{blue}{\left(b \cdot b\right)} \cdot x\right) \]
    10. Simplified43.8%

      \[\leadsto \color{blue}{\left(0.5 \cdot \left(a \cdot a\right)\right) \cdot \left(\left(b \cdot b\right) \cdot x\right)} \]
    11. Taylor expanded in a around 0 43.8%

      \[\leadsto \color{blue}{0.5 \cdot \left({a}^{2} \cdot \left({b}^{2} \cdot x\right)\right)} \]
    12. Step-by-step derivation
      1. unpow243.8%

        \[\leadsto 0.5 \cdot \left(\color{blue}{\left(a \cdot a\right)} \cdot \left({b}^{2} \cdot x\right)\right) \]
      2. unpow243.8%

        \[\leadsto 0.5 \cdot \left(\left(a \cdot a\right) \cdot \left(\color{blue}{\left(b \cdot b\right)} \cdot x\right)\right) \]
      3. associate-*r*49.2%

        \[\leadsto 0.5 \cdot \color{blue}{\left(\left(\left(a \cdot a\right) \cdot \left(b \cdot b\right)\right) \cdot x\right)} \]
      4. associate-*r*49.2%

        \[\leadsto \color{blue}{\left(0.5 \cdot \left(\left(a \cdot a\right) \cdot \left(b \cdot b\right)\right)\right) \cdot x} \]
      5. *-commutative49.2%

        \[\leadsto \color{blue}{x \cdot \left(0.5 \cdot \left(\left(a \cdot a\right) \cdot \left(b \cdot b\right)\right)\right)} \]
      6. *-commutative49.2%

        \[\leadsto x \cdot \color{blue}{\left(\left(\left(a \cdot a\right) \cdot \left(b \cdot b\right)\right) \cdot 0.5\right)} \]
      7. *-commutative49.2%

        \[\leadsto x \cdot \left(\color{blue}{\left(\left(b \cdot b\right) \cdot \left(a \cdot a\right)\right)} \cdot 0.5\right) \]
      8. swap-sqr46.0%

        \[\leadsto x \cdot \left(\color{blue}{\left(\left(b \cdot a\right) \cdot \left(b \cdot a\right)\right)} \cdot 0.5\right) \]
      9. associate-*l*46.0%

        \[\leadsto x \cdot \color{blue}{\left(\left(b \cdot a\right) \cdot \left(\left(b \cdot a\right) \cdot 0.5\right)\right)} \]
      10. *-commutative46.0%

        \[\leadsto x \cdot \left(\color{blue}{\left(a \cdot b\right)} \cdot \left(\left(b \cdot a\right) \cdot 0.5\right)\right) \]
      11. *-commutative46.0%

        \[\leadsto x \cdot \left(\left(a \cdot b\right) \cdot \left(\color{blue}{\left(a \cdot b\right)} \cdot 0.5\right)\right) \]
    13. Simplified46.0%

      \[\leadsto \color{blue}{x \cdot \left(\left(a \cdot b\right) \cdot \left(\left(a \cdot b\right) \cdot 0.5\right)\right)} \]

    if -8.00000000000000035e48 < a < -1.42e-77 or -1.7499999999999999e-297 < a < 1.14999999999999997e116

    1. Initial program 100.0%

      \[x \cdot e^{y \cdot \left(\log z - t\right) + a \cdot \left(\log \left(1 - z\right) - b\right)} \]
    2. Taylor expanded in t around inf 69.0%

      \[\leadsto x \cdot e^{\color{blue}{-1 \cdot \left(y \cdot t\right)}} \]
    3. Step-by-step derivation
      1. mul-1-neg69.0%

        \[\leadsto x \cdot e^{\color{blue}{-y \cdot t}} \]
      2. distribute-rgt-neg-out69.0%

        \[\leadsto x \cdot e^{\color{blue}{y \cdot \left(-t\right)}} \]
    4. Simplified69.0%

      \[\leadsto x \cdot e^{\color{blue}{y \cdot \left(-t\right)}} \]
    5. Taylor expanded in y around 0 36.0%

      \[\leadsto \color{blue}{-1 \cdot \left(y \cdot \left(t \cdot x\right)\right) + x} \]
    6. Step-by-step derivation
      1. +-commutative36.0%

        \[\leadsto \color{blue}{x + -1 \cdot \left(y \cdot \left(t \cdot x\right)\right)} \]
      2. mul-1-neg36.0%

        \[\leadsto x + \color{blue}{\left(-y \cdot \left(t \cdot x\right)\right)} \]
      3. unsub-neg36.0%

        \[\leadsto \color{blue}{x - y \cdot \left(t \cdot x\right)} \]
    7. Simplified36.0%

      \[\leadsto \color{blue}{x - y \cdot \left(t \cdot x\right)} \]
    8. Taylor expanded in x around 0 38.9%

      \[\leadsto \color{blue}{\left(1 - y \cdot t\right) \cdot x} \]
    9. Step-by-step derivation
      1. *-commutative38.9%

        \[\leadsto \color{blue}{x \cdot \left(1 - y \cdot t\right)} \]
      2. distribute-rgt-out--38.9%

        \[\leadsto \color{blue}{1 \cdot x - \left(y \cdot t\right) \cdot x} \]
      3. associate-*r*36.0%

        \[\leadsto 1 \cdot x - \color{blue}{y \cdot \left(t \cdot x\right)} \]
      4. *-commutative36.0%

        \[\leadsto 1 \cdot x - y \cdot \color{blue}{\left(x \cdot t\right)} \]
      5. *-lft-identity36.0%

        \[\leadsto \color{blue}{x} - y \cdot \left(x \cdot t\right) \]
      6. *-commutative36.0%

        \[\leadsto x - \color{blue}{\left(x \cdot t\right) \cdot y} \]
      7. *-commutative36.0%

        \[\leadsto x - \color{blue}{\left(t \cdot x\right)} \cdot y \]
      8. associate-*l*39.6%

        \[\leadsto x - \color{blue}{t \cdot \left(x \cdot y\right)} \]
    10. Simplified39.6%

      \[\leadsto \color{blue}{x - t \cdot \left(x \cdot y\right)} \]

    if -1.42e-77 < a < -1.7499999999999999e-297 or 1.14999999999999997e116 < a

    1. Initial program 92.8%

      \[x \cdot e^{y \cdot \left(\log z - t\right) + a \cdot \left(\log \left(1 - z\right) - b\right)} \]
    2. Taylor expanded in b around inf 58.1%

      \[\leadsto x \cdot e^{\color{blue}{-1 \cdot \left(a \cdot b\right)}} \]
    3. Step-by-step derivation
      1. associate-*r*58.1%

        \[\leadsto x \cdot e^{\color{blue}{\left(-1 \cdot a\right) \cdot b}} \]
      2. neg-mul-158.1%

        \[\leadsto x \cdot e^{\color{blue}{\left(-a\right)} \cdot b} \]
      3. *-commutative58.1%

        \[\leadsto x \cdot e^{\color{blue}{b \cdot \left(-a\right)}} \]
    4. Simplified58.1%

      \[\leadsto x \cdot e^{\color{blue}{b \cdot \left(-a\right)}} \]
    5. Taylor expanded in b around 0 31.0%

      \[\leadsto x \cdot \color{blue}{\left(1 + \left(0.5 \cdot \left({a}^{2} \cdot {b}^{2}\right) + -1 \cdot \left(a \cdot b\right)\right)\right)} \]
    6. Step-by-step derivation
      1. mul-1-neg31.0%

        \[\leadsto x \cdot \left(1 + \left(0.5 \cdot \left({a}^{2} \cdot {b}^{2}\right) + \color{blue}{\left(-a \cdot b\right)}\right)\right) \]
      2. unsub-neg31.0%

        \[\leadsto x \cdot \left(1 + \color{blue}{\left(0.5 \cdot \left({a}^{2} \cdot {b}^{2}\right) - a \cdot b\right)}\right) \]
      3. associate-*r*31.0%

        \[\leadsto x \cdot \left(1 + \left(\color{blue}{\left(0.5 \cdot {a}^{2}\right) \cdot {b}^{2}} - a \cdot b\right)\right) \]
      4. unpow231.0%

        \[\leadsto x \cdot \left(1 + \left(\left(0.5 \cdot {a}^{2}\right) \cdot \color{blue}{\left(b \cdot b\right)} - a \cdot b\right)\right) \]
      5. associate-*r*26.3%

        \[\leadsto x \cdot \left(1 + \left(\color{blue}{\left(\left(0.5 \cdot {a}^{2}\right) \cdot b\right) \cdot b} - a \cdot b\right)\right) \]
      6. distribute-rgt-out--26.4%

        \[\leadsto x \cdot \left(1 + \color{blue}{b \cdot \left(\left(0.5 \cdot {a}^{2}\right) \cdot b - a\right)}\right) \]
      7. *-commutative26.4%

        \[\leadsto x \cdot \left(1 + b \cdot \left(\color{blue}{\left({a}^{2} \cdot 0.5\right)} \cdot b - a\right)\right) \]
      8. unpow226.4%

        \[\leadsto x \cdot \left(1 + b \cdot \left(\left(\color{blue}{\left(a \cdot a\right)} \cdot 0.5\right) \cdot b - a\right)\right) \]
      9. associate-*l*26.4%

        \[\leadsto x \cdot \left(1 + b \cdot \left(\color{blue}{\left(a \cdot \left(a \cdot 0.5\right)\right)} \cdot b - a\right)\right) \]
    7. Simplified26.4%

      \[\leadsto x \cdot \color{blue}{\left(1 + b \cdot \left(\left(a \cdot \left(a \cdot 0.5\right)\right) \cdot b - a\right)\right)} \]
    8. Taylor expanded in b around inf 36.5%

      \[\leadsto \color{blue}{0.5 \cdot \left({a}^{2} \cdot \left({b}^{2} \cdot x\right)\right)} \]
    9. Step-by-step derivation
      1. associate-*r*36.5%

        \[\leadsto \color{blue}{\left(0.5 \cdot {a}^{2}\right) \cdot \left({b}^{2} \cdot x\right)} \]
      2. *-commutative36.5%

        \[\leadsto \color{blue}{\left({a}^{2} \cdot 0.5\right)} \cdot \left({b}^{2} \cdot x\right) \]
      3. unpow236.5%

        \[\leadsto \left(\color{blue}{\left(a \cdot a\right)} \cdot 0.5\right) \cdot \left({b}^{2} \cdot x\right) \]
      4. associate-*l*36.5%

        \[\leadsto \color{blue}{\left(a \cdot \left(a \cdot 0.5\right)\right)} \cdot \left({b}^{2} \cdot x\right) \]
      5. associate-*l*50.7%

        \[\leadsto \color{blue}{a \cdot \left(\left(a \cdot 0.5\right) \cdot \left({b}^{2} \cdot x\right)\right)} \]
      6. unpow250.7%

        \[\leadsto a \cdot \left(\left(a \cdot 0.5\right) \cdot \left(\color{blue}{\left(b \cdot b\right)} \cdot x\right)\right) \]
    10. Simplified50.7%

      \[\leadsto \color{blue}{a \cdot \left(\left(a \cdot 0.5\right) \cdot \left(\left(b \cdot b\right) \cdot x\right)\right)} \]
  3. Recombined 3 regimes into one program.
  4. Final simplification44.1%

    \[\leadsto \begin{array}{l} \mathbf{if}\;a \leq -8 \cdot 10^{+48}:\\ \;\;\;\;x \cdot \left(\left(a \cdot b\right) \cdot \left(0.5 \cdot \left(a \cdot b\right)\right)\right)\\ \mathbf{elif}\;a \leq -1.42 \cdot 10^{-77} \lor \neg \left(a \leq -1.75 \cdot 10^{-297}\right) \land a \leq 1.15 \cdot 10^{+116}:\\ \;\;\;\;x - t \cdot \left(x \cdot y\right)\\ \mathbf{else}:\\ \;\;\;\;a \cdot \left(\left(a \cdot 0.5\right) \cdot \left(x \cdot \left(b \cdot b\right)\right)\right)\\ \end{array} \]

Alternative 12: 35.4% accurate, 16.4× speedup?

\[\begin{array}{l} \mathbf{if}\;t \leq -1.85 \cdot 10^{+137}:\\ \;\;\;\;x - t \cdot \left(x \cdot y\right)\\ \mathbf{elif}\;t \leq -2.05 \cdot 10^{-122} \lor \neg \left(t \leq 35\right):\\ \;\;\;\;a \cdot \left(\left(a \cdot 0.5\right) \cdot \left(x \cdot \left(b \cdot b\right)\right)\right)\\ \mathbf{else}:\\ \;\;\;\;x \cdot \left(1 + 0.5 \cdot \left(\left(b \cdot b\right) \cdot \left(a \cdot a\right)\right)\right)\\ \end{array} \]
Derivation
  1. Split input into 3 regimes
  2. if t < -1.8500000000000001e137

    1. Initial program 97.1%

      \[x \cdot e^{y \cdot \left(\log z - t\right) + a \cdot \left(\log \left(1 - z\right) - b\right)} \]
    2. Taylor expanded in t around inf 88.6%

      \[\leadsto x \cdot e^{\color{blue}{-1 \cdot \left(y \cdot t\right)}} \]
    3. Step-by-step derivation
      1. mul-1-neg88.6%

        \[\leadsto x \cdot e^{\color{blue}{-y \cdot t}} \]
      2. distribute-rgt-neg-out88.6%

        \[\leadsto x \cdot e^{\color{blue}{y \cdot \left(-t\right)}} \]
    4. Simplified88.6%

      \[\leadsto x \cdot e^{\color{blue}{y \cdot \left(-t\right)}} \]
    5. Taylor expanded in y around 0 37.1%

      \[\leadsto \color{blue}{-1 \cdot \left(y \cdot \left(t \cdot x\right)\right) + x} \]
    6. Step-by-step derivation
      1. +-commutative37.1%

        \[\leadsto \color{blue}{x + -1 \cdot \left(y \cdot \left(t \cdot x\right)\right)} \]
      2. mul-1-neg37.1%

        \[\leadsto x + \color{blue}{\left(-y \cdot \left(t \cdot x\right)\right)} \]
      3. unsub-neg37.1%

        \[\leadsto \color{blue}{x - y \cdot \left(t \cdot x\right)} \]
    7. Simplified37.1%

      \[\leadsto \color{blue}{x - y \cdot \left(t \cdot x\right)} \]
    8. Taylor expanded in x around 0 39.8%

      \[\leadsto \color{blue}{\left(1 - y \cdot t\right) \cdot x} \]
    9. Step-by-step derivation
      1. *-commutative39.8%

        \[\leadsto \color{blue}{x \cdot \left(1 - y \cdot t\right)} \]
      2. distribute-rgt-out--39.8%

        \[\leadsto \color{blue}{1 \cdot x - \left(y \cdot t\right) \cdot x} \]
      3. associate-*r*37.1%

        \[\leadsto 1 \cdot x - \color{blue}{y \cdot \left(t \cdot x\right)} \]
      4. *-commutative37.1%

        \[\leadsto 1 \cdot x - y \cdot \color{blue}{\left(x \cdot t\right)} \]
      5. *-lft-identity37.1%

        \[\leadsto \color{blue}{x} - y \cdot \left(x \cdot t\right) \]
      6. *-commutative37.1%

        \[\leadsto x - \color{blue}{\left(x \cdot t\right) \cdot y} \]
      7. *-commutative37.1%

        \[\leadsto x - \color{blue}{\left(t \cdot x\right)} \cdot y \]
      8. associate-*l*39.8%

        \[\leadsto x - \color{blue}{t \cdot \left(x \cdot y\right)} \]
    10. Simplified39.8%

      \[\leadsto \color{blue}{x - t \cdot \left(x \cdot y\right)} \]

    if -1.8500000000000001e137 < t < -2.05e-122 or 35 < t

    1. Initial program 92.7%

      \[x \cdot e^{y \cdot \left(\log z - t\right) + a \cdot \left(\log \left(1 - z\right) - b\right)} \]
    2. Taylor expanded in b around inf 47.9%

      \[\leadsto x \cdot e^{\color{blue}{-1 \cdot \left(a \cdot b\right)}} \]
    3. Step-by-step derivation
      1. associate-*r*47.9%

        \[\leadsto x \cdot e^{\color{blue}{\left(-1 \cdot a\right) \cdot b}} \]
      2. neg-mul-147.9%

        \[\leadsto x \cdot e^{\color{blue}{\left(-a\right)} \cdot b} \]
      3. *-commutative47.9%

        \[\leadsto x \cdot e^{\color{blue}{b \cdot \left(-a\right)}} \]
    4. Simplified47.9%

      \[\leadsto x \cdot e^{\color{blue}{b \cdot \left(-a\right)}} \]
    5. Taylor expanded in b around 0 25.7%

      \[\leadsto x \cdot \color{blue}{\left(1 + \left(0.5 \cdot \left({a}^{2} \cdot {b}^{2}\right) + -1 \cdot \left(a \cdot b\right)\right)\right)} \]
    6. Step-by-step derivation
      1. mul-1-neg25.7%

        \[\leadsto x \cdot \left(1 + \left(0.5 \cdot \left({a}^{2} \cdot {b}^{2}\right) + \color{blue}{\left(-a \cdot b\right)}\right)\right) \]
      2. unsub-neg25.7%

        \[\leadsto x \cdot \left(1 + \color{blue}{\left(0.5 \cdot \left({a}^{2} \cdot {b}^{2}\right) - a \cdot b\right)}\right) \]
      3. associate-*r*25.7%

        \[\leadsto x \cdot \left(1 + \left(\color{blue}{\left(0.5 \cdot {a}^{2}\right) \cdot {b}^{2}} - a \cdot b\right)\right) \]
      4. unpow225.7%

        \[\leadsto x \cdot \left(1 + \left(\left(0.5 \cdot {a}^{2}\right) \cdot \color{blue}{\left(b \cdot b\right)} - a \cdot b\right)\right) \]
      5. associate-*r*29.8%

        \[\leadsto x \cdot \left(1 + \left(\color{blue}{\left(\left(0.5 \cdot {a}^{2}\right) \cdot b\right) \cdot b} - a \cdot b\right)\right) \]
      6. distribute-rgt-out--31.7%

        \[\leadsto x \cdot \left(1 + \color{blue}{b \cdot \left(\left(0.5 \cdot {a}^{2}\right) \cdot b - a\right)}\right) \]
      7. *-commutative31.7%

        \[\leadsto x \cdot \left(1 + b \cdot \left(\color{blue}{\left({a}^{2} \cdot 0.5\right)} \cdot b - a\right)\right) \]
      8. unpow231.7%

        \[\leadsto x \cdot \left(1 + b \cdot \left(\left(\color{blue}{\left(a \cdot a\right)} \cdot 0.5\right) \cdot b - a\right)\right) \]
      9. associate-*l*31.7%

        \[\leadsto x \cdot \left(1 + b \cdot \left(\color{blue}{\left(a \cdot \left(a \cdot 0.5\right)\right)} \cdot b - a\right)\right) \]
    7. Simplified31.7%

      \[\leadsto x \cdot \color{blue}{\left(1 + b \cdot \left(\left(a \cdot \left(a \cdot 0.5\right)\right) \cdot b - a\right)\right)} \]
    8. Taylor expanded in b around inf 35.5%

      \[\leadsto \color{blue}{0.5 \cdot \left({a}^{2} \cdot \left({b}^{2} \cdot x\right)\right)} \]
    9. Step-by-step derivation
      1. associate-*r*35.5%

        \[\leadsto \color{blue}{\left(0.5 \cdot {a}^{2}\right) \cdot \left({b}^{2} \cdot x\right)} \]
      2. *-commutative35.5%

        \[\leadsto \color{blue}{\left({a}^{2} \cdot 0.5\right)} \cdot \left({b}^{2} \cdot x\right) \]
      3. unpow235.5%

        \[\leadsto \left(\color{blue}{\left(a \cdot a\right)} \cdot 0.5\right) \cdot \left({b}^{2} \cdot x\right) \]
      4. associate-*l*35.5%

        \[\leadsto \color{blue}{\left(a \cdot \left(a \cdot 0.5\right)\right)} \cdot \left({b}^{2} \cdot x\right) \]
      5. associate-*l*44.9%

        \[\leadsto \color{blue}{a \cdot \left(\left(a \cdot 0.5\right) \cdot \left({b}^{2} \cdot x\right)\right)} \]
      6. unpow244.9%

        \[\leadsto a \cdot \left(\left(a \cdot 0.5\right) \cdot \left(\color{blue}{\left(b \cdot b\right)} \cdot x\right)\right) \]
    10. Simplified44.9%

      \[\leadsto \color{blue}{a \cdot \left(\left(a \cdot 0.5\right) \cdot \left(\left(b \cdot b\right) \cdot x\right)\right)} \]

    if -2.05e-122 < t < 35

    1. Initial program 98.0%

      \[x \cdot e^{y \cdot \left(\log z - t\right) + a \cdot \left(\log \left(1 - z\right) - b\right)} \]
    2. Taylor expanded in b around inf 71.5%

      \[\leadsto x \cdot e^{\color{blue}{-1 \cdot \left(a \cdot b\right)}} \]
    3. Step-by-step derivation
      1. associate-*r*71.5%

        \[\leadsto x \cdot e^{\color{blue}{\left(-1 \cdot a\right) \cdot b}} \]
      2. neg-mul-171.5%

        \[\leadsto x \cdot e^{\color{blue}{\left(-a\right)} \cdot b} \]
      3. *-commutative71.5%

        \[\leadsto x \cdot e^{\color{blue}{b \cdot \left(-a\right)}} \]
    4. Simplified71.5%

      \[\leadsto x \cdot e^{\color{blue}{b \cdot \left(-a\right)}} \]
    5. Taylor expanded in b around 0 46.1%

      \[\leadsto x \cdot \color{blue}{\left(1 + \left(0.5 \cdot \left({a}^{2} \cdot {b}^{2}\right) + -1 \cdot \left(a \cdot b\right)\right)\right)} \]
    6. Step-by-step derivation
      1. mul-1-neg46.1%

        \[\leadsto x \cdot \left(1 + \left(0.5 \cdot \left({a}^{2} \cdot {b}^{2}\right) + \color{blue}{\left(-a \cdot b\right)}\right)\right) \]
      2. unsub-neg46.1%

        \[\leadsto x \cdot \left(1 + \color{blue}{\left(0.5 \cdot \left({a}^{2} \cdot {b}^{2}\right) - a \cdot b\right)}\right) \]
      3. associate-*r*46.1%

        \[\leadsto x \cdot \left(1 + \left(\color{blue}{\left(0.5 \cdot {a}^{2}\right) \cdot {b}^{2}} - a \cdot b\right)\right) \]
      4. unpow246.1%

        \[\leadsto x \cdot \left(1 + \left(\left(0.5 \cdot {a}^{2}\right) \cdot \color{blue}{\left(b \cdot b\right)} - a \cdot b\right)\right) \]
      5. associate-*r*43.7%

        \[\leadsto x \cdot \left(1 + \left(\color{blue}{\left(\left(0.5 \cdot {a}^{2}\right) \cdot b\right) \cdot b} - a \cdot b\right)\right) \]
      6. distribute-rgt-out--43.8%

        \[\leadsto x \cdot \left(1 + \color{blue}{b \cdot \left(\left(0.5 \cdot {a}^{2}\right) \cdot b - a\right)}\right) \]
      7. *-commutative43.8%

        \[\leadsto x \cdot \left(1 + b \cdot \left(\color{blue}{\left({a}^{2} \cdot 0.5\right)} \cdot b - a\right)\right) \]
      8. unpow243.8%

        \[\leadsto x \cdot \left(1 + b \cdot \left(\left(\color{blue}{\left(a \cdot a\right)} \cdot 0.5\right) \cdot b - a\right)\right) \]
      9. associate-*l*43.8%

        \[\leadsto x \cdot \left(1 + b \cdot \left(\color{blue}{\left(a \cdot \left(a \cdot 0.5\right)\right)} \cdot b - a\right)\right) \]
    7. Simplified43.8%

      \[\leadsto x \cdot \color{blue}{\left(1 + b \cdot \left(\left(a \cdot \left(a \cdot 0.5\right)\right) \cdot b - a\right)\right)} \]
    8. Taylor expanded in b around inf 45.9%

      \[\leadsto x \cdot \left(1 + \color{blue}{0.5 \cdot \left({a}^{2} \cdot {b}^{2}\right)}\right) \]
    9. Step-by-step derivation
      1. unpow245.9%

        \[\leadsto x \cdot \left(1 + 0.5 \cdot \left(\color{blue}{\left(a \cdot a\right)} \cdot {b}^{2}\right)\right) \]
      2. unpow245.9%

        \[\leadsto x \cdot \left(1 + 0.5 \cdot \left(\left(a \cdot a\right) \cdot \color{blue}{\left(b \cdot b\right)}\right)\right) \]
    10. Simplified45.9%

      \[\leadsto x \cdot \left(1 + \color{blue}{0.5 \cdot \left(\left(a \cdot a\right) \cdot \left(b \cdot b\right)\right)}\right) \]
  3. Recombined 3 regimes into one program.
  4. Final simplification44.7%

    \[\leadsto \begin{array}{l} \mathbf{if}\;t \leq -1.85 \cdot 10^{+137}:\\ \;\;\;\;x - t \cdot \left(x \cdot y\right)\\ \mathbf{elif}\;t \leq -2.05 \cdot 10^{-122} \lor \neg \left(t \leq 35\right):\\ \;\;\;\;a \cdot \left(\left(a \cdot 0.5\right) \cdot \left(x \cdot \left(b \cdot b\right)\right)\right)\\ \mathbf{else}:\\ \;\;\;\;x \cdot \left(1 + 0.5 \cdot \left(\left(b \cdot b\right) \cdot \left(a \cdot a\right)\right)\right)\\ \end{array} \]

Alternative 13: 37.1% accurate, 16.4× speedup?

\[\begin{array}{l} \mathbf{if}\;t \leq -1.9 \cdot 10^{+137}:\\ \;\;\;\;x - t \cdot \left(x \cdot y\right)\\ \mathbf{elif}\;t \leq -1.15 \cdot 10^{-5} \lor \neg \left(t \leq 1.1 \cdot 10^{+14}\right):\\ \;\;\;\;a \cdot \left(\left(a \cdot 0.5\right) \cdot \left(x \cdot \left(b \cdot b\right)\right)\right)\\ \mathbf{else}:\\ \;\;\;\;x \cdot \left(1 + a \cdot \left(\left(a \cdot 0.5\right) \cdot \left(b \cdot b\right)\right)\right)\\ \end{array} \]
Derivation
  1. Split input into 3 regimes
  2. if t < -1.89999999999999981e137

    1. Initial program 97.1%

      \[x \cdot e^{y \cdot \left(\log z - t\right) + a \cdot \left(\log \left(1 - z\right) - b\right)} \]
    2. Taylor expanded in t around inf 88.6%

      \[\leadsto x \cdot e^{\color{blue}{-1 \cdot \left(y \cdot t\right)}} \]
    3. Step-by-step derivation
      1. mul-1-neg88.6%

        \[\leadsto x \cdot e^{\color{blue}{-y \cdot t}} \]
      2. distribute-rgt-neg-out88.6%

        \[\leadsto x \cdot e^{\color{blue}{y \cdot \left(-t\right)}} \]
    4. Simplified88.6%

      \[\leadsto x \cdot e^{\color{blue}{y \cdot \left(-t\right)}} \]
    5. Taylor expanded in y around 0 37.1%

      \[\leadsto \color{blue}{-1 \cdot \left(y \cdot \left(t \cdot x\right)\right) + x} \]
    6. Step-by-step derivation
      1. +-commutative37.1%

        \[\leadsto \color{blue}{x + -1 \cdot \left(y \cdot \left(t \cdot x\right)\right)} \]
      2. mul-1-neg37.1%

        \[\leadsto x + \color{blue}{\left(-y \cdot \left(t \cdot x\right)\right)} \]
      3. unsub-neg37.1%

        \[\leadsto \color{blue}{x - y \cdot \left(t \cdot x\right)} \]
    7. Simplified37.1%

      \[\leadsto \color{blue}{x - y \cdot \left(t \cdot x\right)} \]
    8. Taylor expanded in x around 0 39.8%

      \[\leadsto \color{blue}{\left(1 - y \cdot t\right) \cdot x} \]
    9. Step-by-step derivation
      1. *-commutative39.8%

        \[\leadsto \color{blue}{x \cdot \left(1 - y \cdot t\right)} \]
      2. distribute-rgt-out--39.8%

        \[\leadsto \color{blue}{1 \cdot x - \left(y \cdot t\right) \cdot x} \]
      3. associate-*r*37.1%

        \[\leadsto 1 \cdot x - \color{blue}{y \cdot \left(t \cdot x\right)} \]
      4. *-commutative37.1%

        \[\leadsto 1 \cdot x - y \cdot \color{blue}{\left(x \cdot t\right)} \]
      5. *-lft-identity37.1%

        \[\leadsto \color{blue}{x} - y \cdot \left(x \cdot t\right) \]
      6. *-commutative37.1%

        \[\leadsto x - \color{blue}{\left(x \cdot t\right) \cdot y} \]
      7. *-commutative37.1%

        \[\leadsto x - \color{blue}{\left(t \cdot x\right)} \cdot y \]
      8. associate-*l*39.8%

        \[\leadsto x - \color{blue}{t \cdot \left(x \cdot y\right)} \]
    10. Simplified39.8%

      \[\leadsto \color{blue}{x - t \cdot \left(x \cdot y\right)} \]

    if -1.89999999999999981e137 < t < -1.15e-5 or 1.1e14 < t

    1. Initial program 91.3%

      \[x \cdot e^{y \cdot \left(\log z - t\right) + a \cdot \left(\log \left(1 - z\right) - b\right)} \]
    2. Taylor expanded in b around inf 42.4%

      \[\leadsto x \cdot e^{\color{blue}{-1 \cdot \left(a \cdot b\right)}} \]
    3. Step-by-step derivation
      1. associate-*r*42.4%

        \[\leadsto x \cdot e^{\color{blue}{\left(-1 \cdot a\right) \cdot b}} \]
      2. neg-mul-142.4%

        \[\leadsto x \cdot e^{\color{blue}{\left(-a\right)} \cdot b} \]
      3. *-commutative42.4%

        \[\leadsto x \cdot e^{\color{blue}{b \cdot \left(-a\right)}} \]
    4. Simplified42.4%

      \[\leadsto x \cdot e^{\color{blue}{b \cdot \left(-a\right)}} \]
    5. Taylor expanded in b around 0 24.9%

      \[\leadsto x \cdot \color{blue}{\left(1 + \left(0.5 \cdot \left({a}^{2} \cdot {b}^{2}\right) + -1 \cdot \left(a \cdot b\right)\right)\right)} \]
    6. Step-by-step derivation
      1. mul-1-neg24.9%

        \[\leadsto x \cdot \left(1 + \left(0.5 \cdot \left({a}^{2} \cdot {b}^{2}\right) + \color{blue}{\left(-a \cdot b\right)}\right)\right) \]
      2. unsub-neg24.9%

        \[\leadsto x \cdot \left(1 + \color{blue}{\left(0.5 \cdot \left({a}^{2} \cdot {b}^{2}\right) - a \cdot b\right)}\right) \]
      3. associate-*r*24.9%

        \[\leadsto x \cdot \left(1 + \left(\color{blue}{\left(0.5 \cdot {a}^{2}\right) \cdot {b}^{2}} - a \cdot b\right)\right) \]
      4. unpow224.9%

        \[\leadsto x \cdot \left(1 + \left(\left(0.5 \cdot {a}^{2}\right) \cdot \color{blue}{\left(b \cdot b\right)} - a \cdot b\right)\right) \]
      5. associate-*r*26.3%

        \[\leadsto x \cdot \left(1 + \left(\color{blue}{\left(\left(0.5 \cdot {a}^{2}\right) \cdot b\right) \cdot b} - a \cdot b\right)\right) \]
      6. distribute-rgt-out--28.6%

        \[\leadsto x \cdot \left(1 + \color{blue}{b \cdot \left(\left(0.5 \cdot {a}^{2}\right) \cdot b - a\right)}\right) \]
      7. *-commutative28.6%

        \[\leadsto x \cdot \left(1 + b \cdot \left(\color{blue}{\left({a}^{2} \cdot 0.5\right)} \cdot b - a\right)\right) \]
      8. unpow228.6%

        \[\leadsto x \cdot \left(1 + b \cdot \left(\left(\color{blue}{\left(a \cdot a\right)} \cdot 0.5\right) \cdot b - a\right)\right) \]
      9. associate-*l*28.6%

        \[\leadsto x \cdot \left(1 + b \cdot \left(\color{blue}{\left(a \cdot \left(a \cdot 0.5\right)\right)} \cdot b - a\right)\right) \]
    7. Simplified28.6%

      \[\leadsto x \cdot \color{blue}{\left(1 + b \cdot \left(\left(a \cdot \left(a \cdot 0.5\right)\right) \cdot b - a\right)\right)} \]
    8. Taylor expanded in b around inf 37.5%

      \[\leadsto \color{blue}{0.5 \cdot \left({a}^{2} \cdot \left({b}^{2} \cdot x\right)\right)} \]
    9. Step-by-step derivation
      1. associate-*r*37.5%

        \[\leadsto \color{blue}{\left(0.5 \cdot {a}^{2}\right) \cdot \left({b}^{2} \cdot x\right)} \]
      2. *-commutative37.5%

        \[\leadsto \color{blue}{\left({a}^{2} \cdot 0.5\right)} \cdot \left({b}^{2} \cdot x\right) \]
      3. unpow237.5%

        \[\leadsto \left(\color{blue}{\left(a \cdot a\right)} \cdot 0.5\right) \cdot \left({b}^{2} \cdot x\right) \]
      4. associate-*l*37.5%

        \[\leadsto \color{blue}{\left(a \cdot \left(a \cdot 0.5\right)\right)} \cdot \left({b}^{2} \cdot x\right) \]
      5. associate-*l*46.4%

        \[\leadsto \color{blue}{a \cdot \left(\left(a \cdot 0.5\right) \cdot \left({b}^{2} \cdot x\right)\right)} \]
      6. unpow246.4%

        \[\leadsto a \cdot \left(\left(a \cdot 0.5\right) \cdot \left(\color{blue}{\left(b \cdot b\right)} \cdot x\right)\right) \]
    10. Simplified46.4%

      \[\leadsto \color{blue}{a \cdot \left(\left(a \cdot 0.5\right) \cdot \left(\left(b \cdot b\right) \cdot x\right)\right)} \]

    if -1.15e-5 < t < 1.1e14

    1. Initial program 98.2%

      \[x \cdot e^{y \cdot \left(\log z - t\right) + a \cdot \left(\log \left(1 - z\right) - b\right)} \]
    2. Taylor expanded in b around inf 72.3%

      \[\leadsto x \cdot e^{\color{blue}{-1 \cdot \left(a \cdot b\right)}} \]
    3. Step-by-step derivation
      1. associate-*r*72.3%

        \[\leadsto x \cdot e^{\color{blue}{\left(-1 \cdot a\right) \cdot b}} \]
      2. neg-mul-172.3%

        \[\leadsto x \cdot e^{\color{blue}{\left(-a\right)} \cdot b} \]
      3. *-commutative72.3%

        \[\leadsto x \cdot e^{\color{blue}{b \cdot \left(-a\right)}} \]
    4. Simplified72.3%

      \[\leadsto x \cdot e^{\color{blue}{b \cdot \left(-a\right)}} \]
    5. Taylor expanded in b around 0 44.0%

      \[\leadsto x \cdot \color{blue}{\left(1 + \left(0.5 \cdot \left({a}^{2} \cdot {b}^{2}\right) + -1 \cdot \left(a \cdot b\right)\right)\right)} \]
    6. Step-by-step derivation
      1. mul-1-neg44.0%

        \[\leadsto x \cdot \left(1 + \left(0.5 \cdot \left({a}^{2} \cdot {b}^{2}\right) + \color{blue}{\left(-a \cdot b\right)}\right)\right) \]
      2. unsub-neg44.0%

        \[\leadsto x \cdot \left(1 + \color{blue}{\left(0.5 \cdot \left({a}^{2} \cdot {b}^{2}\right) - a \cdot b\right)}\right) \]
      3. associate-*r*44.0%

        \[\leadsto x \cdot \left(1 + \left(\color{blue}{\left(0.5 \cdot {a}^{2}\right) \cdot {b}^{2}} - a \cdot b\right)\right) \]
      4. unpow244.0%

        \[\leadsto x \cdot \left(1 + \left(\left(0.5 \cdot {a}^{2}\right) \cdot \color{blue}{\left(b \cdot b\right)} - a \cdot b\right)\right) \]
      5. associate-*r*44.3%

        \[\leadsto x \cdot \left(1 + \left(\color{blue}{\left(\left(0.5 \cdot {a}^{2}\right) \cdot b\right) \cdot b} - a \cdot b\right)\right) \]
      6. distribute-rgt-out--44.4%

        \[\leadsto x \cdot \left(1 + \color{blue}{b \cdot \left(\left(0.5 \cdot {a}^{2}\right) \cdot b - a\right)}\right) \]
      7. *-commutative44.4%

        \[\leadsto x \cdot \left(1 + b \cdot \left(\color{blue}{\left({a}^{2} \cdot 0.5\right)} \cdot b - a\right)\right) \]
      8. unpow244.4%

        \[\leadsto x \cdot \left(1 + b \cdot \left(\left(\color{blue}{\left(a \cdot a\right)} \cdot 0.5\right) \cdot b - a\right)\right) \]
      9. associate-*l*44.4%

        \[\leadsto x \cdot \left(1 + b \cdot \left(\color{blue}{\left(a \cdot \left(a \cdot 0.5\right)\right)} \cdot b - a\right)\right) \]
    7. Simplified44.4%

      \[\leadsto x \cdot \color{blue}{\left(1 + b \cdot \left(\left(a \cdot \left(a \cdot 0.5\right)\right) \cdot b - a\right)\right)} \]
    8. Taylor expanded in b around inf 43.9%

      \[\leadsto x \cdot \left(1 + \color{blue}{0.5 \cdot \left({a}^{2} \cdot {b}^{2}\right)}\right) \]
    9. Step-by-step derivation
      1. associate-*r*43.9%

        \[\leadsto x \cdot \left(1 + \color{blue}{\left(0.5 \cdot {a}^{2}\right) \cdot {b}^{2}}\right) \]
      2. *-commutative43.9%

        \[\leadsto x \cdot \left(1 + \color{blue}{\left({a}^{2} \cdot 0.5\right)} \cdot {b}^{2}\right) \]
      3. unpow243.9%

        \[\leadsto x \cdot \left(1 + \left(\color{blue}{\left(a \cdot a\right)} \cdot 0.5\right) \cdot {b}^{2}\right) \]
      4. associate-*l*43.9%

        \[\leadsto x \cdot \left(1 + \color{blue}{\left(a \cdot \left(a \cdot 0.5\right)\right)} \cdot {b}^{2}\right) \]
      5. associate-*l*45.9%

        \[\leadsto x \cdot \left(1 + \color{blue}{a \cdot \left(\left(a \cdot 0.5\right) \cdot {b}^{2}\right)}\right) \]
      6. unpow245.9%

        \[\leadsto x \cdot \left(1 + a \cdot \left(\left(a \cdot 0.5\right) \cdot \color{blue}{\left(b \cdot b\right)}\right)\right) \]
    10. Simplified45.9%

      \[\leadsto x \cdot \left(1 + \color{blue}{a \cdot \left(\left(a \cdot 0.5\right) \cdot \left(b \cdot b\right)\right)}\right) \]
  3. Recombined 3 regimes into one program.
  4. Final simplification45.3%

    \[\leadsto \begin{array}{l} \mathbf{if}\;t \leq -1.9 \cdot 10^{+137}:\\ \;\;\;\;x - t \cdot \left(x \cdot y\right)\\ \mathbf{elif}\;t \leq -1.15 \cdot 10^{-5} \lor \neg \left(t \leq 1.1 \cdot 10^{+14}\right):\\ \;\;\;\;a \cdot \left(\left(a \cdot 0.5\right) \cdot \left(x \cdot \left(b \cdot b\right)\right)\right)\\ \mathbf{else}:\\ \;\;\;\;x \cdot \left(1 + a \cdot \left(\left(a \cdot 0.5\right) \cdot \left(b \cdot b\right)\right)\right)\\ \end{array} \]

Alternative 14: 43.8% accurate, 18.4× speedup?

\[\begin{array}{l} \mathbf{if}\;a \leq -7 \cdot 10^{+48}:\\ \;\;\;\;x \cdot \left(1 + b \cdot \left(b \cdot \left(a \cdot \left(a \cdot 0.5\right)\right) - a\right)\right)\\ \mathbf{elif}\;a \leq 5.1 \cdot 10^{+116}:\\ \;\;\;\;x + x \cdot \left(0.5 \cdot \left(\left(y \cdot y\right) \cdot \left(t \cdot t\right)\right)\right)\\ \mathbf{else}:\\ \;\;\;\;a \cdot \left(\left(a \cdot 0.5\right) \cdot \left(x \cdot \left(b \cdot b\right)\right)\right)\\ \end{array} \]
Derivation
  1. Split input into 3 regimes
  2. if a < -6.9999999999999995e48

    1. Initial program 89.0%

      \[x \cdot e^{y \cdot \left(\log z - t\right) + a \cdot \left(\log \left(1 - z\right) - b\right)} \]
    2. Taylor expanded in b around inf 72.7%

      \[\leadsto x \cdot e^{\color{blue}{-1 \cdot \left(a \cdot b\right)}} \]
    3. Step-by-step derivation
      1. associate-*r*72.7%

        \[\leadsto x \cdot e^{\color{blue}{\left(-1 \cdot a\right) \cdot b}} \]
      2. neg-mul-172.7%

        \[\leadsto x \cdot e^{\color{blue}{\left(-a\right)} \cdot b} \]
      3. *-commutative72.7%

        \[\leadsto x \cdot e^{\color{blue}{b \cdot \left(-a\right)}} \]
    4. Simplified72.7%

      \[\leadsto x \cdot e^{\color{blue}{b \cdot \left(-a\right)}} \]
    5. Taylor expanded in b around 0 45.4%

      \[\leadsto x \cdot \color{blue}{\left(1 + \left(0.5 \cdot \left({a}^{2} \cdot {b}^{2}\right) + -1 \cdot \left(a \cdot b\right)\right)\right)} \]
    6. Step-by-step derivation
      1. mul-1-neg45.4%

        \[\leadsto x \cdot \left(1 + \left(0.5 \cdot \left({a}^{2} \cdot {b}^{2}\right) + \color{blue}{\left(-a \cdot b\right)}\right)\right) \]
      2. unsub-neg45.4%

        \[\leadsto x \cdot \left(1 + \color{blue}{\left(0.5 \cdot \left({a}^{2} \cdot {b}^{2}\right) - a \cdot b\right)}\right) \]
      3. associate-*r*45.4%

        \[\leadsto x \cdot \left(1 + \left(\color{blue}{\left(0.5 \cdot {a}^{2}\right) \cdot {b}^{2}} - a \cdot b\right)\right) \]
      4. unpow245.4%

        \[\leadsto x \cdot \left(1 + \left(\left(0.5 \cdot {a}^{2}\right) \cdot \color{blue}{\left(b \cdot b\right)} - a \cdot b\right)\right) \]
      5. associate-*r*54.7%

        \[\leadsto x \cdot \left(1 + \left(\color{blue}{\left(\left(0.5 \cdot {a}^{2}\right) \cdot b\right) \cdot b} - a \cdot b\right)\right) \]
      6. distribute-rgt-out--58.5%

        \[\leadsto x \cdot \left(1 + \color{blue}{b \cdot \left(\left(0.5 \cdot {a}^{2}\right) \cdot b - a\right)}\right) \]
      7. *-commutative58.5%

        \[\leadsto x \cdot \left(1 + b \cdot \left(\color{blue}{\left({a}^{2} \cdot 0.5\right)} \cdot b - a\right)\right) \]
      8. unpow258.5%

        \[\leadsto x \cdot \left(1 + b \cdot \left(\left(\color{blue}{\left(a \cdot a\right)} \cdot 0.5\right) \cdot b - a\right)\right) \]
      9. associate-*l*58.5%

        \[\leadsto x \cdot \left(1 + b \cdot \left(\color{blue}{\left(a \cdot \left(a \cdot 0.5\right)\right)} \cdot b - a\right)\right) \]
    7. Simplified58.5%

      \[\leadsto x \cdot \color{blue}{\left(1 + b \cdot \left(\left(a \cdot \left(a \cdot 0.5\right)\right) \cdot b - a\right)\right)} \]

    if -6.9999999999999995e48 < a < 5.09999999999999999e116

    1. Initial program 100.0%

      \[x \cdot e^{y \cdot \left(\log z - t\right) + a \cdot \left(\log \left(1 - z\right) - b\right)} \]
    2. Taylor expanded in t around inf 69.5%

      \[\leadsto x \cdot e^{\color{blue}{-1 \cdot \left(y \cdot t\right)}} \]
    3. Step-by-step derivation
      1. mul-1-neg69.5%

        \[\leadsto x \cdot e^{\color{blue}{-y \cdot t}} \]
      2. distribute-rgt-neg-out69.5%

        \[\leadsto x \cdot e^{\color{blue}{y \cdot \left(-t\right)}} \]
    4. Simplified69.5%

      \[\leadsto x \cdot e^{\color{blue}{y \cdot \left(-t\right)}} \]
    5. Taylor expanded in y around 0 36.0%

      \[\leadsto \color{blue}{0.5 \cdot \left({y}^{2} \cdot \left({t}^{2} \cdot x\right)\right) + \left(-1 \cdot \left(y \cdot \left(t \cdot x\right)\right) + x\right)} \]
    6. Step-by-step derivation
      1. associate-+r+36.0%

        \[\leadsto \color{blue}{\left(0.5 \cdot \left({y}^{2} \cdot \left({t}^{2} \cdot x\right)\right) + -1 \cdot \left(y \cdot \left(t \cdot x\right)\right)\right) + x} \]
      2. +-commutative36.0%

        \[\leadsto \color{blue}{x + \left(0.5 \cdot \left({y}^{2} \cdot \left({t}^{2} \cdot x\right)\right) + -1 \cdot \left(y \cdot \left(t \cdot x\right)\right)\right)} \]
      3. mul-1-neg36.0%

        \[\leadsto x + \left(0.5 \cdot \left({y}^{2} \cdot \left({t}^{2} \cdot x\right)\right) + \color{blue}{\left(-y \cdot \left(t \cdot x\right)\right)}\right) \]
      4. unsub-neg36.0%

        \[\leadsto x + \color{blue}{\left(0.5 \cdot \left({y}^{2} \cdot \left({t}^{2} \cdot x\right)\right) - y \cdot \left(t \cdot x\right)\right)} \]
      5. associate-*r*37.8%

        \[\leadsto x + \left(0.5 \cdot \color{blue}{\left(\left({y}^{2} \cdot {t}^{2}\right) \cdot x\right)} - y \cdot \left(t \cdot x\right)\right) \]
      6. associate-*r*37.8%

        \[\leadsto x + \left(\color{blue}{\left(0.5 \cdot \left({y}^{2} \cdot {t}^{2}\right)\right) \cdot x} - y \cdot \left(t \cdot x\right)\right) \]
      7. associate-*r*38.4%

        \[\leadsto x + \left(\left(0.5 \cdot \left({y}^{2} \cdot {t}^{2}\right)\right) \cdot x - \color{blue}{\left(y \cdot t\right) \cdot x}\right) \]
      8. distribute-rgt-out--38.5%

        \[\leadsto x + \color{blue}{x \cdot \left(0.5 \cdot \left({y}^{2} \cdot {t}^{2}\right) - y \cdot t\right)} \]
      9. unpow238.5%

        \[\leadsto x + x \cdot \left(0.5 \cdot \left(\color{blue}{\left(y \cdot y\right)} \cdot {t}^{2}\right) - y \cdot t\right) \]
      10. unpow238.5%

        \[\leadsto x + x \cdot \left(0.5 \cdot \left(\left(y \cdot y\right) \cdot \color{blue}{\left(t \cdot t\right)}\right) - y \cdot t\right) \]
      11. unswap-sqr40.2%

        \[\leadsto x + x \cdot \left(0.5 \cdot \color{blue}{\left(\left(y \cdot t\right) \cdot \left(y \cdot t\right)\right)} - y \cdot t\right) \]
    7. Simplified40.2%

      \[\leadsto \color{blue}{x + x \cdot \left(0.5 \cdot \left(\left(y \cdot t\right) \cdot \left(y \cdot t\right)\right) - y \cdot t\right)} \]
    8. Taylor expanded in y around inf 38.6%

      \[\leadsto x + x \cdot \color{blue}{\left(0.5 \cdot \left({y}^{2} \cdot {t}^{2}\right)\right)} \]
    9. Step-by-step derivation
      1. unpow238.6%

        \[\leadsto x + x \cdot \left(0.5 \cdot \left(\color{blue}{\left(y \cdot y\right)} \cdot {t}^{2}\right)\right) \]
      2. unpow238.6%

        \[\leadsto x + x \cdot \left(0.5 \cdot \left(\left(y \cdot y\right) \cdot \color{blue}{\left(t \cdot t\right)}\right)\right) \]
    10. Simplified38.6%

      \[\leadsto x + x \cdot \color{blue}{\left(0.5 \cdot \left(\left(y \cdot y\right) \cdot \left(t \cdot t\right)\right)\right)} \]

    if 5.09999999999999999e116 < a

    1. Initial program 86.5%

      \[x \cdot e^{y \cdot \left(\log z - t\right) + a \cdot \left(\log \left(1 - z\right) - b\right)} \]
    2. Taylor expanded in b around inf 76.6%

      \[\leadsto x \cdot e^{\color{blue}{-1 \cdot \left(a \cdot b\right)}} \]
    3. Step-by-step derivation
      1. associate-*r*76.6%

        \[\leadsto x \cdot e^{\color{blue}{\left(-1 \cdot a\right) \cdot b}} \]
      2. neg-mul-176.6%

        \[\leadsto x \cdot e^{\color{blue}{\left(-a\right)} \cdot b} \]
      3. *-commutative76.6%

        \[\leadsto x \cdot e^{\color{blue}{b \cdot \left(-a\right)}} \]
    4. Simplified76.6%

      \[\leadsto x \cdot e^{\color{blue}{b \cdot \left(-a\right)}} \]
    5. Taylor expanded in b around 0 33.9%

      \[\leadsto x \cdot \color{blue}{\left(1 + \left(0.5 \cdot \left({a}^{2} \cdot {b}^{2}\right) + -1 \cdot \left(a \cdot b\right)\right)\right)} \]
    6. Step-by-step derivation
      1. mul-1-neg33.9%

        \[\leadsto x \cdot \left(1 + \left(0.5 \cdot \left({a}^{2} \cdot {b}^{2}\right) + \color{blue}{\left(-a \cdot b\right)}\right)\right) \]
      2. unsub-neg33.9%

        \[\leadsto x \cdot \left(1 + \color{blue}{\left(0.5 \cdot \left({a}^{2} \cdot {b}^{2}\right) - a \cdot b\right)}\right) \]
      3. associate-*r*33.9%

        \[\leadsto x \cdot \left(1 + \left(\color{blue}{\left(0.5 \cdot {a}^{2}\right) \cdot {b}^{2}} - a \cdot b\right)\right) \]
      4. unpow233.9%

        \[\leadsto x \cdot \left(1 + \left(\left(0.5 \cdot {a}^{2}\right) \cdot \color{blue}{\left(b \cdot b\right)} - a \cdot b\right)\right) \]
      5. associate-*r*34.3%

        \[\leadsto x \cdot \left(1 + \left(\color{blue}{\left(\left(0.5 \cdot {a}^{2}\right) \cdot b\right) \cdot b} - a \cdot b\right)\right) \]
      6. distribute-rgt-out--34.5%

        \[\leadsto x \cdot \left(1 + \color{blue}{b \cdot \left(\left(0.5 \cdot {a}^{2}\right) \cdot b - a\right)}\right) \]
      7. *-commutative34.5%

        \[\leadsto x \cdot \left(1 + b \cdot \left(\color{blue}{\left({a}^{2} \cdot 0.5\right)} \cdot b - a\right)\right) \]
      8. unpow234.5%

        \[\leadsto x \cdot \left(1 + b \cdot \left(\left(\color{blue}{\left(a \cdot a\right)} \cdot 0.5\right) \cdot b - a\right)\right) \]
      9. associate-*l*34.5%

        \[\leadsto x \cdot \left(1 + b \cdot \left(\color{blue}{\left(a \cdot \left(a \cdot 0.5\right)\right)} \cdot b - a\right)\right) \]
    7. Simplified34.5%

      \[\leadsto x \cdot \color{blue}{\left(1 + b \cdot \left(\left(a \cdot \left(a \cdot 0.5\right)\right) \cdot b - a\right)\right)} \]
    8. Taylor expanded in b around inf 33.9%

      \[\leadsto \color{blue}{0.5 \cdot \left({a}^{2} \cdot \left({b}^{2} \cdot x\right)\right)} \]
    9. Step-by-step derivation
      1. associate-*r*33.9%

        \[\leadsto \color{blue}{\left(0.5 \cdot {a}^{2}\right) \cdot \left({b}^{2} \cdot x\right)} \]
      2. *-commutative33.9%

        \[\leadsto \color{blue}{\left({a}^{2} \cdot 0.5\right)} \cdot \left({b}^{2} \cdot x\right) \]
      3. unpow233.9%

        \[\leadsto \left(\color{blue}{\left(a \cdot a\right)} \cdot 0.5\right) \cdot \left({b}^{2} \cdot x\right) \]
      4. associate-*l*33.9%

        \[\leadsto \color{blue}{\left(a \cdot \left(a \cdot 0.5\right)\right)} \cdot \left({b}^{2} \cdot x\right) \]
      5. associate-*l*54.9%

        \[\leadsto \color{blue}{a \cdot \left(\left(a \cdot 0.5\right) \cdot \left({b}^{2} \cdot x\right)\right)} \]
      6. unpow254.9%

        \[\leadsto a \cdot \left(\left(a \cdot 0.5\right) \cdot \left(\color{blue}{\left(b \cdot b\right)} \cdot x\right)\right) \]
    10. Simplified54.9%

      \[\leadsto \color{blue}{a \cdot \left(\left(a \cdot 0.5\right) \cdot \left(\left(b \cdot b\right) \cdot x\right)\right)} \]
  3. Recombined 3 regimes into one program.
  4. Final simplification45.2%

    \[\leadsto \begin{array}{l} \mathbf{if}\;a \leq -7 \cdot 10^{+48}:\\ \;\;\;\;x \cdot \left(1 + b \cdot \left(b \cdot \left(a \cdot \left(a \cdot 0.5\right)\right) - a\right)\right)\\ \mathbf{elif}\;a \leq 5.1 \cdot 10^{+116}:\\ \;\;\;\;x + x \cdot \left(0.5 \cdot \left(\left(y \cdot y\right) \cdot \left(t \cdot t\right)\right)\right)\\ \mathbf{else}:\\ \;\;\;\;a \cdot \left(\left(a \cdot 0.5\right) \cdot \left(x \cdot \left(b \cdot b\right)\right)\right)\\ \end{array} \]

Alternative 15: 23.3% accurate, 25.8× speedup?

\[\begin{array}{l} t_1 := x \cdot \left(y \cdot \left(-t\right)\right)\\ \mathbf{if}\;t \leq -5 \cdot 10^{+66}:\\ \;\;\;\;t_1\\ \mathbf{elif}\;t \leq 1.15 \cdot 10^{+57}:\\ \;\;\;\;x\\ \mathbf{elif}\;t \leq 3.9 \cdot 10^{+246}:\\ \;\;\;\;a \cdot \left(x \cdot \left(-b\right)\right)\\ \mathbf{else}:\\ \;\;\;\;t_1\\ \end{array} \]
Derivation
  1. Split input into 3 regimes
  2. if t < -4.99999999999999991e66 or 3.9e246 < t

    1. Initial program 93.5%

      \[x \cdot e^{y \cdot \left(\log z - t\right) + a \cdot \left(\log \left(1 - z\right) - b\right)} \]
    2. Taylor expanded in t around inf 85.8%

      \[\leadsto x \cdot e^{\color{blue}{-1 \cdot \left(y \cdot t\right)}} \]
    3. Step-by-step derivation
      1. mul-1-neg85.8%

        \[\leadsto x \cdot e^{\color{blue}{-y \cdot t}} \]
      2. distribute-rgt-neg-out85.8%

        \[\leadsto x \cdot e^{\color{blue}{y \cdot \left(-t\right)}} \]
    4. Simplified85.8%

      \[\leadsto x \cdot e^{\color{blue}{y \cdot \left(-t\right)}} \]
    5. Taylor expanded in y around 0 33.3%

      \[\leadsto \color{blue}{-1 \cdot \left(y \cdot \left(t \cdot x\right)\right) + x} \]
    6. Step-by-step derivation
      1. +-commutative33.3%

        \[\leadsto \color{blue}{x + -1 \cdot \left(y \cdot \left(t \cdot x\right)\right)} \]
      2. mul-1-neg33.3%

        \[\leadsto x + \color{blue}{\left(-y \cdot \left(t \cdot x\right)\right)} \]
      3. unsub-neg33.3%

        \[\leadsto \color{blue}{x - y \cdot \left(t \cdot x\right)} \]
    7. Simplified33.3%

      \[\leadsto \color{blue}{x - y \cdot \left(t \cdot x\right)} \]
    8. Taylor expanded in y around inf 32.0%

      \[\leadsto \color{blue}{-1 \cdot \left(y \cdot \left(t \cdot x\right)\right)} \]
    9. Step-by-step derivation
      1. mul-1-neg32.0%

        \[\leadsto \color{blue}{-y \cdot \left(t \cdot x\right)} \]
      2. associate-*r*35.0%

        \[\leadsto -\color{blue}{\left(y \cdot t\right) \cdot x} \]
      3. *-commutative35.0%

        \[\leadsto -\color{blue}{x \cdot \left(y \cdot t\right)} \]
      4. distribute-rgt-neg-in35.0%

        \[\leadsto \color{blue}{x \cdot \left(-y \cdot t\right)} \]
      5. distribute-rgt-neg-in35.0%

        \[\leadsto x \cdot \color{blue}{\left(y \cdot \left(-t\right)\right)} \]
    10. Simplified35.0%

      \[\leadsto \color{blue}{x \cdot \left(y \cdot \left(-t\right)\right)} \]

    if -4.99999999999999991e66 < t < 1.1499999999999999e57

    1. Initial program 96.5%

      \[x \cdot e^{y \cdot \left(\log z - t\right) + a \cdot \left(\log \left(1 - z\right) - b\right)} \]
    2. Taylor expanded in t around inf 39.5%

      \[\leadsto x \cdot e^{\color{blue}{-1 \cdot \left(y \cdot t\right)}} \]
    3. Step-by-step derivation
      1. mul-1-neg39.5%

        \[\leadsto x \cdot e^{\color{blue}{-y \cdot t}} \]
      2. distribute-rgt-neg-out39.5%

        \[\leadsto x \cdot e^{\color{blue}{y \cdot \left(-t\right)}} \]
    4. Simplified39.5%

      \[\leadsto x \cdot e^{\color{blue}{y \cdot \left(-t\right)}} \]
    5. Taylor expanded in y around 0 25.8%

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

    if 1.1499999999999999e57 < t < 3.9e246

    1. Initial program 95.4%

      \[x \cdot e^{y \cdot \left(\log z - t\right) + a \cdot \left(\log \left(1 - z\right) - b\right)} \]
    2. Taylor expanded in b around inf 41.5%

      \[\leadsto x \cdot e^{\color{blue}{-1 \cdot \left(a \cdot b\right)}} \]
    3. Step-by-step derivation
      1. associate-*r*41.5%

        \[\leadsto x \cdot e^{\color{blue}{\left(-1 \cdot a\right) \cdot b}} \]
      2. neg-mul-141.5%

        \[\leadsto x \cdot e^{\color{blue}{\left(-a\right)} \cdot b} \]
      3. *-commutative41.5%

        \[\leadsto x \cdot e^{\color{blue}{b \cdot \left(-a\right)}} \]
    4. Simplified41.5%

      \[\leadsto x \cdot e^{\color{blue}{b \cdot \left(-a\right)}} \]
    5. Taylor expanded in b around 0 21.2%

      \[\leadsto x \cdot \color{blue}{\left(1 + -1 \cdot \left(a \cdot b\right)\right)} \]
    6. Step-by-step derivation
      1. mul-1-neg21.2%

        \[\leadsto x \cdot \left(1 + \color{blue}{\left(-a \cdot b\right)}\right) \]
      2. unsub-neg21.2%

        \[\leadsto x \cdot \color{blue}{\left(1 - a \cdot b\right)} \]
    7. Simplified21.2%

      \[\leadsto x \cdot \color{blue}{\left(1 - a \cdot b\right)} \]
    8. Taylor expanded in a around inf 25.4%

      \[\leadsto \color{blue}{-1 \cdot \left(a \cdot \left(b \cdot x\right)\right)} \]
    9. Step-by-step derivation
      1. associate-*r*25.4%

        \[\leadsto \color{blue}{\left(-1 \cdot a\right) \cdot \left(b \cdot x\right)} \]
      2. neg-mul-125.4%

        \[\leadsto \color{blue}{\left(-a\right)} \cdot \left(b \cdot x\right) \]
    10. Simplified25.4%

      \[\leadsto \color{blue}{\left(-a\right) \cdot \left(b \cdot x\right)} \]
  3. Recombined 3 regimes into one program.
  4. Final simplification27.9%

    \[\leadsto \begin{array}{l} \mathbf{if}\;t \leq -5 \cdot 10^{+66}:\\ \;\;\;\;x \cdot \left(y \cdot \left(-t\right)\right)\\ \mathbf{elif}\;t \leq 1.15 \cdot 10^{+57}:\\ \;\;\;\;x\\ \mathbf{elif}\;t \leq 3.9 \cdot 10^{+246}:\\ \;\;\;\;a \cdot \left(x \cdot \left(-b\right)\right)\\ \mathbf{else}:\\ \;\;\;\;x \cdot \left(y \cdot \left(-t\right)\right)\\ \end{array} \]

Alternative 16: 23.4% accurate, 25.8× speedup?

\[\begin{array}{l} t_1 := x \cdot \left(y \cdot \left(-t\right)\right)\\ \mathbf{if}\;t \leq -6.6 \cdot 10^{+65}:\\ \;\;\;\;t_1\\ \mathbf{elif}\;t \leq 2.2 \cdot 10^{+56}:\\ \;\;\;\;x\\ \mathbf{elif}\;t \leq 2.25 \cdot 10^{+244}:\\ \;\;\;\;\left(a \cdot b\right) \cdot \left(-x\right)\\ \mathbf{else}:\\ \;\;\;\;t_1\\ \end{array} \]
Derivation
  1. Split input into 3 regimes
  2. if t < -6.60000000000000046e65 or 2.2500000000000001e244 < t

    1. Initial program 93.5%

      \[x \cdot e^{y \cdot \left(\log z - t\right) + a \cdot \left(\log \left(1 - z\right) - b\right)} \]
    2. Taylor expanded in t around inf 85.8%

      \[\leadsto x \cdot e^{\color{blue}{-1 \cdot \left(y \cdot t\right)}} \]
    3. Step-by-step derivation
      1. mul-1-neg85.8%

        \[\leadsto x \cdot e^{\color{blue}{-y \cdot t}} \]
      2. distribute-rgt-neg-out85.8%

        \[\leadsto x \cdot e^{\color{blue}{y \cdot \left(-t\right)}} \]
    4. Simplified85.8%

      \[\leadsto x \cdot e^{\color{blue}{y \cdot \left(-t\right)}} \]
    5. Taylor expanded in y around 0 33.3%

      \[\leadsto \color{blue}{-1 \cdot \left(y \cdot \left(t \cdot x\right)\right) + x} \]
    6. Step-by-step derivation
      1. +-commutative33.3%

        \[\leadsto \color{blue}{x + -1 \cdot \left(y \cdot \left(t \cdot x\right)\right)} \]
      2. mul-1-neg33.3%

        \[\leadsto x + \color{blue}{\left(-y \cdot \left(t \cdot x\right)\right)} \]
      3. unsub-neg33.3%

        \[\leadsto \color{blue}{x - y \cdot \left(t \cdot x\right)} \]
    7. Simplified33.3%

      \[\leadsto \color{blue}{x - y \cdot \left(t \cdot x\right)} \]
    8. Taylor expanded in y around inf 32.0%

      \[\leadsto \color{blue}{-1 \cdot \left(y \cdot \left(t \cdot x\right)\right)} \]
    9. Step-by-step derivation
      1. mul-1-neg32.0%

        \[\leadsto \color{blue}{-y \cdot \left(t \cdot x\right)} \]
      2. associate-*r*35.0%

        \[\leadsto -\color{blue}{\left(y \cdot t\right) \cdot x} \]
      3. *-commutative35.0%

        \[\leadsto -\color{blue}{x \cdot \left(y \cdot t\right)} \]
      4. distribute-rgt-neg-in35.0%

        \[\leadsto \color{blue}{x \cdot \left(-y \cdot t\right)} \]
      5. distribute-rgt-neg-in35.0%

        \[\leadsto x \cdot \color{blue}{\left(y \cdot \left(-t\right)\right)} \]
    10. Simplified35.0%

      \[\leadsto \color{blue}{x \cdot \left(y \cdot \left(-t\right)\right)} \]

    if -6.60000000000000046e65 < t < 2.20000000000000016e56

    1. Initial program 96.5%

      \[x \cdot e^{y \cdot \left(\log z - t\right) + a \cdot \left(\log \left(1 - z\right) - b\right)} \]
    2. Taylor expanded in t around inf 39.5%

      \[\leadsto x \cdot e^{\color{blue}{-1 \cdot \left(y \cdot t\right)}} \]
    3. Step-by-step derivation
      1. mul-1-neg39.5%

        \[\leadsto x \cdot e^{\color{blue}{-y \cdot t}} \]
      2. distribute-rgt-neg-out39.5%

        \[\leadsto x \cdot e^{\color{blue}{y \cdot \left(-t\right)}} \]
    4. Simplified39.5%

      \[\leadsto x \cdot e^{\color{blue}{y \cdot \left(-t\right)}} \]
    5. Taylor expanded in y around 0 25.8%

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

    if 2.20000000000000016e56 < t < 2.2500000000000001e244

    1. Initial program 95.4%

      \[x \cdot e^{y \cdot \left(\log z - t\right) + a \cdot \left(\log \left(1 - z\right) - b\right)} \]
    2. Taylor expanded in b around inf 41.5%

      \[\leadsto x \cdot e^{\color{blue}{-1 \cdot \left(a \cdot b\right)}} \]
    3. Step-by-step derivation
      1. associate-*r*41.5%

        \[\leadsto x \cdot e^{\color{blue}{\left(-1 \cdot a\right) \cdot b}} \]
      2. neg-mul-141.5%

        \[\leadsto x \cdot e^{\color{blue}{\left(-a\right)} \cdot b} \]
      3. *-commutative41.5%

        \[\leadsto x \cdot e^{\color{blue}{b \cdot \left(-a\right)}} \]
    4. Simplified41.5%

      \[\leadsto x \cdot e^{\color{blue}{b \cdot \left(-a\right)}} \]
    5. Taylor expanded in b around 0 21.2%

      \[\leadsto x \cdot \color{blue}{\left(1 + -1 \cdot \left(a \cdot b\right)\right)} \]
    6. Step-by-step derivation
      1. mul-1-neg21.2%

        \[\leadsto x \cdot \left(1 + \color{blue}{\left(-a \cdot b\right)}\right) \]
      2. unsub-neg21.2%

        \[\leadsto x \cdot \color{blue}{\left(1 - a \cdot b\right)} \]
    7. Simplified21.2%

      \[\leadsto x \cdot \color{blue}{\left(1 - a \cdot b\right)} \]
    8. Taylor expanded in a around inf 25.4%

      \[\leadsto \color{blue}{-1 \cdot \left(a \cdot \left(b \cdot x\right)\right)} \]
    9. Step-by-step derivation
      1. mul-1-neg25.4%

        \[\leadsto \color{blue}{-a \cdot \left(b \cdot x\right)} \]
      2. associate-*r*27.5%

        \[\leadsto -\color{blue}{\left(a \cdot b\right) \cdot x} \]
      3. distribute-rgt-neg-in27.5%

        \[\leadsto \color{blue}{\left(a \cdot b\right) \cdot \left(-x\right)} \]
    10. Simplified27.5%

      \[\leadsto \color{blue}{\left(a \cdot b\right) \cdot \left(-x\right)} \]
  3. Recombined 3 regimes into one program.
  4. Final simplification28.3%

    \[\leadsto \begin{array}{l} \mathbf{if}\;t \leq -6.6 \cdot 10^{+65}:\\ \;\;\;\;x \cdot \left(y \cdot \left(-t\right)\right)\\ \mathbf{elif}\;t \leq 2.2 \cdot 10^{+56}:\\ \;\;\;\;x\\ \mathbf{elif}\;t \leq 2.25 \cdot 10^{+244}:\\ \;\;\;\;\left(a \cdot b\right) \cdot \left(-x\right)\\ \mathbf{else}:\\ \;\;\;\;x \cdot \left(y \cdot \left(-t\right)\right)\\ \end{array} \]

Alternative 17: 30.7% accurate, 28.3× speedup?

\[\begin{array}{l} \mathbf{if}\;a \leq -7.6 \cdot 10^{+50}:\\ \;\;\;\;x - b \cdot \left(x \cdot a\right)\\ \mathbf{elif}\;a \leq 2.8 \cdot 10^{+127}:\\ \;\;\;\;x - t \cdot \left(x \cdot y\right)\\ \mathbf{else}:\\ \;\;\;\;a \cdot \left(x \cdot \left(-b\right)\right)\\ \end{array} \]
Derivation
  1. Split input into 3 regimes
  2. if a < -7.59999999999999975e50

    1. Initial program 88.8%

      \[x \cdot e^{y \cdot \left(\log z - t\right) + a \cdot \left(\log \left(1 - z\right) - b\right)} \]
    2. Taylor expanded in b around inf 74.1%

      \[\leadsto x \cdot e^{\color{blue}{-1 \cdot \left(a \cdot b\right)}} \]
    3. Step-by-step derivation
      1. associate-*r*74.1%

        \[\leadsto x \cdot e^{\color{blue}{\left(-1 \cdot a\right) \cdot b}} \]
      2. neg-mul-174.1%

        \[\leadsto x \cdot e^{\color{blue}{\left(-a\right)} \cdot b} \]
      3. *-commutative74.1%

        \[\leadsto x \cdot e^{\color{blue}{b \cdot \left(-a\right)}} \]
    4. Simplified74.1%

      \[\leadsto x \cdot e^{\color{blue}{b \cdot \left(-a\right)}} \]
    5. Taylor expanded in b around 0 26.7%

      \[\leadsto x \cdot \color{blue}{\left(1 + -1 \cdot \left(a \cdot b\right)\right)} \]
    6. Step-by-step derivation
      1. mul-1-neg26.7%

        \[\leadsto x \cdot \left(1 + \color{blue}{\left(-a \cdot b\right)}\right) \]
      2. unsub-neg26.7%

        \[\leadsto x \cdot \color{blue}{\left(1 - a \cdot b\right)} \]
    7. Simplified26.7%

      \[\leadsto x \cdot \color{blue}{\left(1 - a \cdot b\right)} \]
    8. Taylor expanded in x around 0 26.7%

      \[\leadsto \color{blue}{\left(1 - a \cdot b\right) \cdot x} \]
    9. Step-by-step derivation
      1. *-commutative26.7%

        \[\leadsto \color{blue}{x \cdot \left(1 - a \cdot b\right)} \]
      2. sub-neg26.7%

        \[\leadsto x \cdot \color{blue}{\left(1 + \left(-a \cdot b\right)\right)} \]
      3. mul-1-neg26.7%

        \[\leadsto x \cdot \left(1 + \color{blue}{-1 \cdot \left(a \cdot b\right)}\right) \]
      4. distribute-rgt-in26.7%

        \[\leadsto \color{blue}{1 \cdot x + \left(-1 \cdot \left(a \cdot b\right)\right) \cdot x} \]
      5. *-lft-identity26.7%

        \[\leadsto \color{blue}{x} + \left(-1 \cdot \left(a \cdot b\right)\right) \cdot x \]
      6. mul-1-neg26.7%

        \[\leadsto x + \color{blue}{\left(-a \cdot b\right)} \cdot x \]
      7. distribute-lft-neg-in26.7%

        \[\leadsto x + \color{blue}{\left(-\left(a \cdot b\right) \cdot x\right)} \]
      8. associate-*r*24.9%

        \[\leadsto x + \left(-\color{blue}{a \cdot \left(b \cdot x\right)}\right) \]
      9. unsub-neg24.9%

        \[\leadsto \color{blue}{x - a \cdot \left(b \cdot x\right)} \]
      10. associate-*r*26.7%

        \[\leadsto x - \color{blue}{\left(a \cdot b\right) \cdot x} \]
      11. *-commutative26.7%

        \[\leadsto x - \color{blue}{\left(b \cdot a\right)} \cdot x \]
      12. associate-*l*31.8%

        \[\leadsto x - \color{blue}{b \cdot \left(a \cdot x\right)} \]
    10. Simplified31.8%

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

    if -7.59999999999999975e50 < a < 2.8000000000000002e127

    1. Initial program 100.0%

      \[x \cdot e^{y \cdot \left(\log z - t\right) + a \cdot \left(\log \left(1 - z\right) - b\right)} \]
    2. Taylor expanded in t around inf 68.9%

      \[\leadsto x \cdot e^{\color{blue}{-1 \cdot \left(y \cdot t\right)}} \]
    3. Step-by-step derivation
      1. mul-1-neg68.9%

        \[\leadsto x \cdot e^{\color{blue}{-y \cdot t}} \]
      2. distribute-rgt-neg-out68.9%

        \[\leadsto x \cdot e^{\color{blue}{y \cdot \left(-t\right)}} \]
    4. Simplified68.9%

      \[\leadsto x \cdot e^{\color{blue}{y \cdot \left(-t\right)}} \]
    5. Taylor expanded in y around 0 32.7%

      \[\leadsto \color{blue}{-1 \cdot \left(y \cdot \left(t \cdot x\right)\right) + x} \]
    6. Step-by-step derivation
      1. +-commutative32.7%

        \[\leadsto \color{blue}{x + -1 \cdot \left(y \cdot \left(t \cdot x\right)\right)} \]
      2. mul-1-neg32.7%

        \[\leadsto x + \color{blue}{\left(-y \cdot \left(t \cdot x\right)\right)} \]
      3. unsub-neg32.7%

        \[\leadsto \color{blue}{x - y \cdot \left(t \cdot x\right)} \]
    7. Simplified32.7%

      \[\leadsto \color{blue}{x - y \cdot \left(t \cdot x\right)} \]
    8. Taylor expanded in x around 0 35.0%

      \[\leadsto \color{blue}{\left(1 - y \cdot t\right) \cdot x} \]
    9. Step-by-step derivation
      1. *-commutative35.0%

        \[\leadsto \color{blue}{x \cdot \left(1 - y \cdot t\right)} \]
      2. distribute-rgt-out--35.0%

        \[\leadsto \color{blue}{1 \cdot x - \left(y \cdot t\right) \cdot x} \]
      3. associate-*r*32.7%

        \[\leadsto 1 \cdot x - \color{blue}{y \cdot \left(t \cdot x\right)} \]
      4. *-commutative32.7%

        \[\leadsto 1 \cdot x - y \cdot \color{blue}{\left(x \cdot t\right)} \]
      5. *-lft-identity32.7%

        \[\leadsto \color{blue}{x} - y \cdot \left(x \cdot t\right) \]
      6. *-commutative32.7%

        \[\leadsto x - \color{blue}{\left(x \cdot t\right) \cdot y} \]
      7. *-commutative32.7%

        \[\leadsto x - \color{blue}{\left(t \cdot x\right)} \cdot y \]
      8. associate-*l*35.5%

        \[\leadsto x - \color{blue}{t \cdot \left(x \cdot y\right)} \]
    10. Simplified35.5%

      \[\leadsto \color{blue}{x - t \cdot \left(x \cdot y\right)} \]

    if 2.8000000000000002e127 < a

    1. Initial program 84.5%

      \[x \cdot e^{y \cdot \left(\log z - t\right) + a \cdot \left(\log \left(1 - z\right) - b\right)} \]
    2. Taylor expanded in b around inf 78.9%

      \[\leadsto x \cdot e^{\color{blue}{-1 \cdot \left(a \cdot b\right)}} \]
    3. Step-by-step derivation
      1. associate-*r*78.9%

        \[\leadsto x \cdot e^{\color{blue}{\left(-1 \cdot a\right) \cdot b}} \]
      2. neg-mul-178.9%

        \[\leadsto x \cdot e^{\color{blue}{\left(-a\right)} \cdot b} \]
      3. *-commutative78.9%

        \[\leadsto x \cdot e^{\color{blue}{b \cdot \left(-a\right)}} \]
    4. Simplified78.9%

      \[\leadsto x \cdot e^{\color{blue}{b \cdot \left(-a\right)}} \]
    5. Taylor expanded in b around 0 18.7%

      \[\leadsto x \cdot \color{blue}{\left(1 + -1 \cdot \left(a \cdot b\right)\right)} \]
    6. Step-by-step derivation
      1. mul-1-neg18.7%

        \[\leadsto x \cdot \left(1 + \color{blue}{\left(-a \cdot b\right)}\right) \]
      2. unsub-neg18.7%

        \[\leadsto x \cdot \color{blue}{\left(1 - a \cdot b\right)} \]
    7. Simplified18.7%

      \[\leadsto x \cdot \color{blue}{\left(1 - a \cdot b\right)} \]
    8. Taylor expanded in a around inf 23.0%

      \[\leadsto \color{blue}{-1 \cdot \left(a \cdot \left(b \cdot x\right)\right)} \]
    9. Step-by-step derivation
      1. associate-*r*23.0%

        \[\leadsto \color{blue}{\left(-1 \cdot a\right) \cdot \left(b \cdot x\right)} \]
      2. neg-mul-123.0%

        \[\leadsto \color{blue}{\left(-a\right)} \cdot \left(b \cdot x\right) \]
    10. Simplified23.0%

      \[\leadsto \color{blue}{\left(-a\right) \cdot \left(b \cdot x\right)} \]
  3. Recombined 3 regimes into one program.
  4. Final simplification33.1%

    \[\leadsto \begin{array}{l} \mathbf{if}\;a \leq -7.6 \cdot 10^{+50}:\\ \;\;\;\;x - b \cdot \left(x \cdot a\right)\\ \mathbf{elif}\;a \leq 2.8 \cdot 10^{+127}:\\ \;\;\;\;x - t \cdot \left(x \cdot y\right)\\ \mathbf{else}:\\ \;\;\;\;a \cdot \left(x \cdot \left(-b\right)\right)\\ \end{array} \]

Alternative 18: 23.4% accurate, 31.1× speedup?

\[\begin{array}{l} \mathbf{if}\;t \leq -2.65 \cdot 10^{+66} \lor \neg \left(t \leq 2.1 \cdot 10^{-5}\right):\\ \;\;\;\;x \cdot \left(y \cdot \left(-t\right)\right)\\ \mathbf{else}:\\ \;\;\;\;x\\ \end{array} \]
Derivation
  1. Split input into 2 regimes
  2. if t < -2.6499999999999998e66 or 2.09999999999999988e-5 < t

    1. Initial program 93.8%

      \[x \cdot e^{y \cdot \left(\log z - t\right) + a \cdot \left(\log \left(1 - z\right) - b\right)} \]
    2. Taylor expanded in t around inf 77.5%

      \[\leadsto x \cdot e^{\color{blue}{-1 \cdot \left(y \cdot t\right)}} \]
    3. Step-by-step derivation
      1. mul-1-neg77.5%

        \[\leadsto x \cdot e^{\color{blue}{-y \cdot t}} \]
      2. distribute-rgt-neg-out77.5%

        \[\leadsto x \cdot e^{\color{blue}{y \cdot \left(-t\right)}} \]
    4. Simplified77.5%

      \[\leadsto x \cdot e^{\color{blue}{y \cdot \left(-t\right)}} \]
    5. Taylor expanded in y around 0 24.6%

      \[\leadsto \color{blue}{-1 \cdot \left(y \cdot \left(t \cdot x\right)\right) + x} \]
    6. Step-by-step derivation
      1. +-commutative24.6%

        \[\leadsto \color{blue}{x + -1 \cdot \left(y \cdot \left(t \cdot x\right)\right)} \]
      2. mul-1-neg24.6%

        \[\leadsto x + \color{blue}{\left(-y \cdot \left(t \cdot x\right)\right)} \]
      3. unsub-neg24.6%

        \[\leadsto \color{blue}{x - y \cdot \left(t \cdot x\right)} \]
    7. Simplified24.6%

      \[\leadsto \color{blue}{x - y \cdot \left(t \cdot x\right)} \]
    8. Taylor expanded in y around inf 24.7%

      \[\leadsto \color{blue}{-1 \cdot \left(y \cdot \left(t \cdot x\right)\right)} \]
    9. Step-by-step derivation
      1. mul-1-neg24.7%

        \[\leadsto \color{blue}{-y \cdot \left(t \cdot x\right)} \]
      2. associate-*r*24.7%

        \[\leadsto -\color{blue}{\left(y \cdot t\right) \cdot x} \]
      3. *-commutative24.7%

        \[\leadsto -\color{blue}{x \cdot \left(y \cdot t\right)} \]
      4. distribute-rgt-neg-in24.7%

        \[\leadsto \color{blue}{x \cdot \left(-y \cdot t\right)} \]
      5. distribute-rgt-neg-in24.7%

        \[\leadsto x \cdot \color{blue}{\left(y \cdot \left(-t\right)\right)} \]
    10. Simplified24.7%

      \[\leadsto \color{blue}{x \cdot \left(y \cdot \left(-t\right)\right)} \]

    if -2.6499999999999998e66 < t < 2.09999999999999988e-5

    1. Initial program 97.0%

      \[x \cdot e^{y \cdot \left(\log z - t\right) + a \cdot \left(\log \left(1 - z\right) - b\right)} \]
    2. Taylor expanded in t around inf 39.5%

      \[\leadsto x \cdot e^{\color{blue}{-1 \cdot \left(y \cdot t\right)}} \]
    3. Step-by-step derivation
      1. mul-1-neg39.5%

        \[\leadsto x \cdot e^{\color{blue}{-y \cdot t}} \]
      2. distribute-rgt-neg-out39.5%

        \[\leadsto x \cdot e^{\color{blue}{y \cdot \left(-t\right)}} \]
    4. Simplified39.5%

      \[\leadsto x \cdot e^{\color{blue}{y \cdot \left(-t\right)}} \]
    5. Taylor expanded in y around 0 27.0%

      \[\leadsto \color{blue}{x} \]
  3. Recombined 2 regimes into one program.
  4. Final simplification26.0%

    \[\leadsto \begin{array}{l} \mathbf{if}\;t \leq -2.65 \cdot 10^{+66} \lor \neg \left(t \leq 2.1 \cdot 10^{-5}\right):\\ \;\;\;\;x \cdot \left(y \cdot \left(-t\right)\right)\\ \mathbf{else}:\\ \;\;\;\;x\\ \end{array} \]

Alternative 19: 22.9% accurate, 31.1× speedup?

\[\begin{array}{l} \mathbf{if}\;t \leq -6.6 \cdot 10^{+65}:\\ \;\;\;\;x \cdot \left(y \cdot \left(-t\right)\right)\\ \mathbf{elif}\;t \leq 0.00032:\\ \;\;\;\;x\\ \mathbf{else}:\\ \;\;\;\;y \cdot \left(t \cdot \left(-x\right)\right)\\ \end{array} \]
Derivation
  1. Split input into 3 regimes
  2. if t < -6.60000000000000046e65

    1. Initial program 95.8%

      \[x \cdot e^{y \cdot \left(\log z - t\right) + a \cdot \left(\log \left(1 - z\right) - b\right)} \]
    2. Taylor expanded in t around inf 81.5%

      \[\leadsto x \cdot e^{\color{blue}{-1 \cdot \left(y \cdot t\right)}} \]
    3. Step-by-step derivation
      1. mul-1-neg81.5%

        \[\leadsto x \cdot e^{\color{blue}{-y \cdot t}} \]
      2. distribute-rgt-neg-out81.5%

        \[\leadsto x \cdot e^{\color{blue}{y \cdot \left(-t\right)}} \]
    4. Simplified81.5%

      \[\leadsto x \cdot e^{\color{blue}{y \cdot \left(-t\right)}} \]
    5. Taylor expanded in y around 0 31.8%

      \[\leadsto \color{blue}{-1 \cdot \left(y \cdot \left(t \cdot x\right)\right) + x} \]
    6. Step-by-step derivation
      1. +-commutative31.8%

        \[\leadsto \color{blue}{x + -1 \cdot \left(y \cdot \left(t \cdot x\right)\right)} \]
      2. mul-1-neg31.8%

        \[\leadsto x + \color{blue}{\left(-y \cdot \left(t \cdot x\right)\right)} \]
      3. unsub-neg31.8%

        \[\leadsto \color{blue}{x - y \cdot \left(t \cdot x\right)} \]
    7. Simplified31.8%

      \[\leadsto \color{blue}{x - y \cdot \left(t \cdot x\right)} \]
    8. Taylor expanded in y around inf 30.0%

      \[\leadsto \color{blue}{-1 \cdot \left(y \cdot \left(t \cdot x\right)\right)} \]
    9. Step-by-step derivation
      1. mul-1-neg30.0%

        \[\leadsto \color{blue}{-y \cdot \left(t \cdot x\right)} \]
      2. associate-*r*30.1%

        \[\leadsto -\color{blue}{\left(y \cdot t\right) \cdot x} \]
      3. *-commutative30.1%

        \[\leadsto -\color{blue}{x \cdot \left(y \cdot t\right)} \]
      4. distribute-rgt-neg-in30.1%

        \[\leadsto \color{blue}{x \cdot \left(-y \cdot t\right)} \]
      5. distribute-rgt-neg-in30.1%

        \[\leadsto x \cdot \color{blue}{\left(y \cdot \left(-t\right)\right)} \]
    10. Simplified30.1%

      \[\leadsto \color{blue}{x \cdot \left(y \cdot \left(-t\right)\right)} \]

    if -6.60000000000000046e65 < t < 3.20000000000000026e-4

    1. Initial program 97.0%

      \[x \cdot e^{y \cdot \left(\log z - t\right) + a \cdot \left(\log \left(1 - z\right) - b\right)} \]
    2. Taylor expanded in t around inf 39.5%

      \[\leadsto x \cdot e^{\color{blue}{-1 \cdot \left(y \cdot t\right)}} \]
    3. Step-by-step derivation
      1. mul-1-neg39.5%

        \[\leadsto x \cdot e^{\color{blue}{-y \cdot t}} \]
      2. distribute-rgt-neg-out39.5%

        \[\leadsto x \cdot e^{\color{blue}{y \cdot \left(-t\right)}} \]
    4. Simplified39.5%

      \[\leadsto x \cdot e^{\color{blue}{y \cdot \left(-t\right)}} \]
    5. Taylor expanded in y around 0 27.0%

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

    if 3.20000000000000026e-4 < t

    1. Initial program 92.4%

      \[x \cdot e^{y \cdot \left(\log z - t\right) + a \cdot \left(\log \left(1 - z\right) - b\right)} \]
    2. Taylor expanded in t around inf 74.5%

      \[\leadsto x \cdot e^{\color{blue}{-1 \cdot \left(y \cdot t\right)}} \]
    3. Step-by-step derivation
      1. mul-1-neg74.5%

        \[\leadsto x \cdot e^{\color{blue}{-y \cdot t}} \]
      2. distribute-rgt-neg-out74.5%

        \[\leadsto x \cdot e^{\color{blue}{y \cdot \left(-t\right)}} \]
    4. Simplified74.5%

      \[\leadsto x \cdot e^{\color{blue}{y \cdot \left(-t\right)}} \]
    5. Taylor expanded in y around 0 19.4%

      \[\leadsto \color{blue}{-1 \cdot \left(y \cdot \left(t \cdot x\right)\right) + x} \]
    6. Step-by-step derivation
      1. +-commutative19.4%

        \[\leadsto \color{blue}{x + -1 \cdot \left(y \cdot \left(t \cdot x\right)\right)} \]
      2. mul-1-neg19.4%

        \[\leadsto x + \color{blue}{\left(-y \cdot \left(t \cdot x\right)\right)} \]
      3. unsub-neg19.4%

        \[\leadsto \color{blue}{x - y \cdot \left(t \cdot x\right)} \]
    7. Simplified19.4%

      \[\leadsto \color{blue}{x - y \cdot \left(t \cdot x\right)} \]
    8. Taylor expanded in y around inf 20.9%

      \[\leadsto \color{blue}{-1 \cdot \left(y \cdot \left(t \cdot x\right)\right)} \]
    9. Step-by-step derivation
      1. mul-1-neg20.9%

        \[\leadsto \color{blue}{-y \cdot \left(t \cdot x\right)} \]
      2. *-commutative20.9%

        \[\leadsto -y \cdot \color{blue}{\left(x \cdot t\right)} \]
      3. distribute-rgt-neg-in20.9%

        \[\leadsto \color{blue}{y \cdot \left(-x \cdot t\right)} \]
      4. distribute-lft-neg-in20.9%

        \[\leadsto y \cdot \color{blue}{\left(\left(-x\right) \cdot t\right)} \]
    10. Simplified20.9%

      \[\leadsto \color{blue}{y \cdot \left(\left(-x\right) \cdot t\right)} \]
  3. Recombined 3 regimes into one program.
  4. Final simplification26.0%

    \[\leadsto \begin{array}{l} \mathbf{if}\;t \leq -6.6 \cdot 10^{+65}:\\ \;\;\;\;x \cdot \left(y \cdot \left(-t\right)\right)\\ \mathbf{elif}\;t \leq 0.00032:\\ \;\;\;\;x\\ \mathbf{else}:\\ \;\;\;\;y \cdot \left(t \cdot \left(-x\right)\right)\\ \end{array} \]

Alternative 20: 21.4% accurate, 34.5× speedup?

\[\begin{array}{l} \mathbf{if}\;a \leq -7.3 \cdot 10^{+46} \lor \neg \left(a \leq 1.1 \cdot 10^{+125}\right):\\ \;\;\;\;y \cdot \left(x \cdot t\right)\\ \mathbf{else}:\\ \;\;\;\;x\\ \end{array} \]
Derivation
  1. Split input into 2 regimes
  2. if a < -7.30000000000000028e46 or 1.09999999999999995e125 < a

    1. Initial program 87.7%

      \[x \cdot e^{y \cdot \left(\log z - t\right) + a \cdot \left(\log \left(1 - z\right) - b\right)} \]
    2. Taylor expanded in t around inf 31.1%

      \[\leadsto x \cdot e^{\color{blue}{-1 \cdot \left(y \cdot t\right)}} \]
    3. Step-by-step derivation
      1. mul-1-neg31.1%

        \[\leadsto x \cdot e^{\color{blue}{-y \cdot t}} \]
      2. distribute-rgt-neg-out31.1%

        \[\leadsto x \cdot e^{\color{blue}{y \cdot \left(-t\right)}} \]
    4. Simplified31.1%

      \[\leadsto x \cdot e^{\color{blue}{y \cdot \left(-t\right)}} \]
    5. Taylor expanded in y around 0 10.8%

      \[\leadsto \color{blue}{-1 \cdot \left(y \cdot \left(t \cdot x\right)\right) + x} \]
    6. Step-by-step derivation
      1. +-commutative10.8%

        \[\leadsto \color{blue}{x + -1 \cdot \left(y \cdot \left(t \cdot x\right)\right)} \]
      2. mul-1-neg10.8%

        \[\leadsto x + \color{blue}{\left(-y \cdot \left(t \cdot x\right)\right)} \]
      3. unsub-neg10.8%

        \[\leadsto \color{blue}{x - y \cdot \left(t \cdot x\right)} \]
    7. Simplified10.8%

      \[\leadsto \color{blue}{x - y \cdot \left(t \cdot x\right)} \]
    8. Taylor expanded in y around inf 21.0%

      \[\leadsto \color{blue}{-1 \cdot \left(y \cdot \left(t \cdot x\right)\right)} \]
    9. Step-by-step derivation
      1. mul-1-neg21.0%

        \[\leadsto \color{blue}{-y \cdot \left(t \cdot x\right)} \]
      2. associate-*r*18.9%

        \[\leadsto -\color{blue}{\left(y \cdot t\right) \cdot x} \]
      3. *-commutative18.9%

        \[\leadsto -\color{blue}{x \cdot \left(y \cdot t\right)} \]
      4. distribute-rgt-neg-in18.9%

        \[\leadsto \color{blue}{x \cdot \left(-y \cdot t\right)} \]
      5. distribute-rgt-neg-in18.9%

        \[\leadsto x \cdot \color{blue}{\left(y \cdot \left(-t\right)\right)} \]
    10. Simplified18.9%

      \[\leadsto \color{blue}{x \cdot \left(y \cdot \left(-t\right)\right)} \]
    11. Step-by-step derivation
      1. expm1-log1p-u15.2%

        \[\leadsto \color{blue}{\mathsf{expm1}\left(\mathsf{log1p}\left(x \cdot \left(y \cdot \left(-t\right)\right)\right)\right)} \]
      2. expm1-udef29.5%

        \[\leadsto \color{blue}{e^{\mathsf{log1p}\left(x \cdot \left(y \cdot \left(-t\right)\right)\right)} - 1} \]
      3. *-commutative29.5%

        \[\leadsto e^{\mathsf{log1p}\left(\color{blue}{\left(y \cdot \left(-t\right)\right) \cdot x}\right)} - 1 \]
      4. associate-*l*29.5%

        \[\leadsto e^{\mathsf{log1p}\left(\color{blue}{y \cdot \left(\left(-t\right) \cdot x\right)}\right)} - 1 \]
      5. add-sqr-sqrt17.9%

        \[\leadsto e^{\mathsf{log1p}\left(y \cdot \left(\color{blue}{\left(\sqrt{-t} \cdot \sqrt{-t}\right)} \cdot x\right)\right)} - 1 \]
      6. sqrt-unprod30.5%

        \[\leadsto e^{\mathsf{log1p}\left(y \cdot \left(\color{blue}{\sqrt{\left(-t\right) \cdot \left(-t\right)}} \cdot x\right)\right)} - 1 \]
      7. sqr-neg30.5%

        \[\leadsto e^{\mathsf{log1p}\left(y \cdot \left(\sqrt{\color{blue}{t \cdot t}} \cdot x\right)\right)} - 1 \]
      8. sqrt-prod11.4%

        \[\leadsto e^{\mathsf{log1p}\left(y \cdot \left(\color{blue}{\left(\sqrt{t} \cdot \sqrt{t}\right)} \cdot x\right)\right)} - 1 \]
      9. add-sqr-sqrt29.4%

        \[\leadsto e^{\mathsf{log1p}\left(y \cdot \left(\color{blue}{t} \cdot x\right)\right)} - 1 \]
    12. Applied egg-rr29.4%

      \[\leadsto \color{blue}{e^{\mathsf{log1p}\left(y \cdot \left(t \cdot x\right)\right)} - 1} \]
    13. Step-by-step derivation
      1. expm1-def16.2%

        \[\leadsto \color{blue}{\mathsf{expm1}\left(\mathsf{log1p}\left(y \cdot \left(t \cdot x\right)\right)\right)} \]
      2. expm1-log1p18.8%

        \[\leadsto \color{blue}{y \cdot \left(t \cdot x\right)} \]
      3. *-commutative18.8%

        \[\leadsto y \cdot \color{blue}{\left(x \cdot t\right)} \]
    14. Simplified18.8%

      \[\leadsto \color{blue}{y \cdot \left(x \cdot t\right)} \]

    if -7.30000000000000028e46 < a < 1.09999999999999995e125

    1. Initial program 100.0%

      \[x \cdot e^{y \cdot \left(\log z - t\right) + a \cdot \left(\log \left(1 - z\right) - b\right)} \]
    2. Taylor expanded in t around inf 69.9%

      \[\leadsto x \cdot e^{\color{blue}{-1 \cdot \left(y \cdot t\right)}} \]
    3. Step-by-step derivation
      1. mul-1-neg69.9%

        \[\leadsto x \cdot e^{\color{blue}{-y \cdot t}} \]
      2. distribute-rgt-neg-out69.9%

        \[\leadsto x \cdot e^{\color{blue}{y \cdot \left(-t\right)}} \]
    4. Simplified69.9%

      \[\leadsto x \cdot e^{\color{blue}{y \cdot \left(-t\right)}} \]
    5. Taylor expanded in y around 0 25.8%

      \[\leadsto \color{blue}{x} \]
  3. Recombined 2 regimes into one program.
  4. Final simplification23.3%

    \[\leadsto \begin{array}{l} \mathbf{if}\;a \leq -7.3 \cdot 10^{+46} \lor \neg \left(a \leq 1.1 \cdot 10^{+125}\right):\\ \;\;\;\;y \cdot \left(x \cdot t\right)\\ \mathbf{else}:\\ \;\;\;\;x\\ \end{array} \]

Alternative 21: 30.8% accurate, 34.8× speedup?

\[\begin{array}{l} \mathbf{if}\;y \leq 2.06 \cdot 10^{+21}:\\ \;\;\;\;x \cdot \left(1 - a \cdot b\right)\\ \mathbf{else}:\\ \;\;\;\;y \cdot \left(t \cdot \left(-x\right)\right)\\ \end{array} \]
Derivation
  1. Split input into 2 regimes
  2. if y < 2.06e21

    1. Initial program 95.1%

      \[x \cdot e^{y \cdot \left(\log z - t\right) + a \cdot \left(\log \left(1 - z\right) - b\right)} \]
    2. Taylor expanded in b around inf 64.2%

      \[\leadsto x \cdot e^{\color{blue}{-1 \cdot \left(a \cdot b\right)}} \]
    3. Step-by-step derivation
      1. associate-*r*64.2%

        \[\leadsto x \cdot e^{\color{blue}{\left(-1 \cdot a\right) \cdot b}} \]
      2. neg-mul-164.2%

        \[\leadsto x \cdot e^{\color{blue}{\left(-a\right)} \cdot b} \]
      3. *-commutative64.2%

        \[\leadsto x \cdot e^{\color{blue}{b \cdot \left(-a\right)}} \]
    4. Simplified64.2%

      \[\leadsto x \cdot e^{\color{blue}{b \cdot \left(-a\right)}} \]
    5. Taylor expanded in b around 0 29.7%

      \[\leadsto x \cdot \color{blue}{\left(1 + -1 \cdot \left(a \cdot b\right)\right)} \]
    6. Step-by-step derivation
      1. mul-1-neg29.7%

        \[\leadsto x \cdot \left(1 + \color{blue}{\left(-a \cdot b\right)}\right) \]
      2. unsub-neg29.7%

        \[\leadsto x \cdot \color{blue}{\left(1 - a \cdot b\right)} \]
    7. Simplified29.7%

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

    if 2.06e21 < y

    1. Initial program 97.8%

      \[x \cdot e^{y \cdot \left(\log z - t\right) + a \cdot \left(\log \left(1 - z\right) - b\right)} \]
    2. Taylor expanded in t around inf 65.5%

      \[\leadsto x \cdot e^{\color{blue}{-1 \cdot \left(y \cdot t\right)}} \]
    3. Step-by-step derivation
      1. mul-1-neg65.5%

        \[\leadsto x \cdot e^{\color{blue}{-y \cdot t}} \]
      2. distribute-rgt-neg-out65.5%

        \[\leadsto x \cdot e^{\color{blue}{y \cdot \left(-t\right)}} \]
    4. Simplified65.5%

      \[\leadsto x \cdot e^{\color{blue}{y \cdot \left(-t\right)}} \]
    5. Taylor expanded in y around 0 20.0%

      \[\leadsto \color{blue}{-1 \cdot \left(y \cdot \left(t \cdot x\right)\right) + x} \]
    6. Step-by-step derivation
      1. +-commutative20.0%

        \[\leadsto \color{blue}{x + -1 \cdot \left(y \cdot \left(t \cdot x\right)\right)} \]
      2. mul-1-neg20.0%

        \[\leadsto x + \color{blue}{\left(-y \cdot \left(t \cdot x\right)\right)} \]
      3. unsub-neg20.0%

        \[\leadsto \color{blue}{x - y \cdot \left(t \cdot x\right)} \]
    7. Simplified20.0%

      \[\leadsto \color{blue}{x - y \cdot \left(t \cdot x\right)} \]
    8. Taylor expanded in y around inf 28.4%

      \[\leadsto \color{blue}{-1 \cdot \left(y \cdot \left(t \cdot x\right)\right)} \]
    9. Step-by-step derivation
      1. mul-1-neg28.4%

        \[\leadsto \color{blue}{-y \cdot \left(t \cdot x\right)} \]
      2. *-commutative28.4%

        \[\leadsto -y \cdot \color{blue}{\left(x \cdot t\right)} \]
      3. distribute-rgt-neg-in28.4%

        \[\leadsto \color{blue}{y \cdot \left(-x \cdot t\right)} \]
      4. distribute-lft-neg-in28.4%

        \[\leadsto y \cdot \color{blue}{\left(\left(-x\right) \cdot t\right)} \]
    10. Simplified28.4%

      \[\leadsto \color{blue}{y \cdot \left(\left(-x\right) \cdot t\right)} \]
  3. Recombined 2 regimes into one program.
  4. Final simplification29.5%

    \[\leadsto \begin{array}{l} \mathbf{if}\;y \leq 2.06 \cdot 10^{+21}:\\ \;\;\;\;x \cdot \left(1 - a \cdot b\right)\\ \mathbf{else}:\\ \;\;\;\;y \cdot \left(t \cdot \left(-x\right)\right)\\ \end{array} \]

Alternative 22: 19.3% accurate, 315.0× speedup?

\[x \]
Derivation
  1. Initial program 95.6%

    \[x \cdot e^{y \cdot \left(\log z - t\right) + a \cdot \left(\log \left(1 - z\right) - b\right)} \]
  2. Taylor expanded in t around inf 56.1%

    \[\leadsto x \cdot e^{\color{blue}{-1 \cdot \left(y \cdot t\right)}} \]
  3. Step-by-step derivation
    1. mul-1-neg56.1%

      \[\leadsto x \cdot e^{\color{blue}{-y \cdot t}} \]
    2. distribute-rgt-neg-out56.1%

      \[\leadsto x \cdot e^{\color{blue}{y \cdot \left(-t\right)}} \]
  4. Simplified56.1%

    \[\leadsto x \cdot e^{\color{blue}{y \cdot \left(-t\right)}} \]
  5. Taylor expanded in y around 0 18.5%

    \[\leadsto \color{blue}{x} \]
  6. Final simplification18.5%

    \[\leadsto x \]

Reproduce

?
herbie shell --seed 2023167 
(FPCore (x y z t a b)
  :name "Numeric.SpecFunctions:incompleteBetaApprox from math-functions-0.1.5.2, B"
  :precision binary64
  (* x (exp (+ (* y (- (log z) t)) (* a (- (log (- 1.0 z)) b))))))