Function headOfArg

test/compute-engine/rubi-utils.test.ts:563–564

(arg: Json)

    expect(sameNumerically(r, ce.box(['Power', ['Sinh', 'x'], 2]))).toBe(true);
  });

  test('foldLnExponentialE folds Ln(ExponentialE) → 1', () => {
    const folded = foldLnExponentialE(
      ce,
      ce.box(['Divide', 'y', ['Multiply', 2, ['Ln', 'ExponentialE']]])