MathPHP\Functions\PolynomialTest::dataProviderForVariable PHP Метод

    public function dataProviderForVariable()
    {
        return [[[[1, 2, 3]], 'x² + 2x + 3'], [[[2, 3, 4], "p"], '2p² + 3p + 4'], [[[-1, -2, -3], "q"], '-q² - 2q - 3'], [[[-2, -3, -4], "a"], '-2a² - 3a - 4'], [[[0, 2, 3], "a"], '2a + 3'], [[[1, 0, 3], "a"], 'a² + 3'], [[[1, 2, 0], "a"], 'a² + 2a'], [[[0, 0, 3], "a"], '3'], [[[1, 0, 0], "a"], 'a²'], [[[0, 2, 0], "a"], '2a'], [[[0, -2, 3], "a"], '-2a + 3'], [[[-1, 0, 3], "a"], '-a² + 3'], [[[1, -2, 0], "a"], 'a² - 2a'], [[[0, 0, -3], "a"], '-3'], [[[-1, 0, 0], "a"], '-a²'], [[[0, -2, 0], "a"], '-2a'], [[[0, 0, 0], "a"], '0'], [[[0, 0, 1], "a"], '1'], [[[0, 0, 5], "a"], '5'], [[[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12], "a"], 'a¹¹ + 2a¹⁰ + 3a⁹ + 4a⁸ + 5a⁷ + 6a⁶ + 7a⁵ + 8a⁴ + 9a³ + 10a² + 11a + 12']];
    }