Function simplifiesTo

test/compute-engine/fungrim-loader.test.ts:778–784

(input: unknown, expected: unknown)

    expect(r.some((v) => Math.abs(v - -0.11183255915896297) < 1e-9)).toBe(true); // W₀(−1/10)
    expect(r.some((v) => Math.abs(v - -3.577152063957297) < 1e-9)).toBe(true); // W₋₁(−1/10)
    for (const v of r) expect(v * Math.exp(v)).toBeCloseTo(-0.1, 9);
  });

  it('Arctan: arctan(x) = 0.5 → tan(0.5)  [fungrim:1f026d:solve]', () => {
    const r = solved('\\arctan(x) = 0.5');
    expect(r.length).toBe(1);
    expect(r[0]).toBeCloseTo(Math.tan(0.5), 10);
  });

  it('Tan: tan(x) = 2 → arctan(2)  [fungrim:f516e3:solve]', () => {