src/VerbalExpressions.php
public function multiple($value) {
        $value = self::sanitize($value);
        switch (substr($value, -1)) {
            case '+':
            case '*':
                break;
            default:
                $value .= '+';
                break;
        }
        return $this->add($value);
    }
public function multiple($value) {
        $value = self::sanitize($value);
        switch (substr($value, -1)) {
            case '+':
            case '*':
                break;
            default:
                $value .= '+';
                break;
        }
        return $this->add($value);
    }
Multiple

Adds the multiple modifier at the end of your expression

@access public
@param  string $value Your expression
@return VerbalExpressions