MathPHP\Functions\PolynomialTest::dataProviderForString PHP Метод

    public function dataProviderForString()
    {
        return [[[1, 2, 3], 'x² + 2x + 3'], [[2, 3, 4], '2x² + 3x + 4'], [[-1, -2, -3], '-x² - 2x - 3'], [[-2, -3, -4], '-2x² - 3x - 4'], [[0, 2, 3], '2x + 3'], [[1, 0, 3], 'x² + 3'], [[1, 2, 0], 'x² + 2x'], [[0, 0, 3], '3'], [[1, 0, 0], 'x²'], [[0, 2, 0], '2x'], [[0, -2, 3], '-2x + 3'], [[-1, 0, 3], '-x² + 3'], [[1, -2, 0], 'x² - 2x'], [[0, 0, -3], '-3'], [[-1, 0, 0], '-x²'], [[0, -2, 0], '-2x'], [[0, 0, 0], '0'], [[0, 0, 1], '1'], [[0, 0, 5], '5'], [[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12], 'x¹¹ + 2x¹⁰ + 3x⁹ + 4x⁸ + 5x⁷ + 6x⁶ + 7x⁵ + 8x⁴ + 9x³ + 10x² + 11x + 12']];
    }