$UserInput= "(1,2)(3,4)(5,6)";
$answer= "(5,6)(1,2)(3,4)";

$UserInput= "(1,2)(3,4)";
    $answer= "(1,2)(1,5)(3,4)";

if (strcmp($UserInput, $answer) !== 0) {
        echo 'They do not match';
    }