MathPHP\SetTheory\SetOperationsTest::testAddMulti PHP Method

    public function testAddMulti(array $A, array $x, array $R)
    {
        $setA = new Set($A);
        $setR = new Set($R);
        $setA->addMulti($x);
        $this->assertEquals($setR, $setA);
        $this->assertEquals($setR->asArray(), $setA->asArray());
    }