case 'math':
                if (!args[1] || isNaN(args[1]) || !args[2] || !args[3] || isNaN(args[3])) {
                    const embed = new Discord.RichEmbed()
                        .setTitle("Error")
                        .setDescription(PREFIX + "math {+ (add),x (multiply),- (subtract),/ (divide),% (remainder)}")
                        .setColor(0xFF0000)
                        .setFooter("Requested by " + message.author.username, message.author.avatarURL);
                    message.channel.send(embed);
                } else if (args[2] == "+") {
                    var Sum = +args[1] + +args[3];
                    message.channel.send('The sum of ' + args[1] + ' + ' + args[3] + ' is ' + Sum + '.');
                } else if (args[2] == "x") {
                    var Product = args[1] * args[3]
                    message.channel.send('The product of ' + args[1] + ' x ' + args[3] + ' is ' + Product + '.');
                } else if (args[2] == "-") {
                    var Difference = args[1] - args[3]
                    message.channel.send('The difference of ' + args[1] + ' - ' + args[3] + ' is ' + Difference + '.');
                } else if (args[2] == "/") {
                    var Quotient = args[1] / args[3]
                    message.channel.send('The quotient of ' + args[1] + ' / ' + args[3] + ' is ' + Quotient + '.');
                } else if (args[2] == "%") {
                    var Remainder = args[1] % args[3]
                    message.channel.send('The remainder of ' + args[1] + ' % ' + args[3] + ' is ' + Remainder + '.');
                } else {const embed = new Discord.RichEmbed()
                    .setTitle("Error")
                    .setDescription(PREFIX + "math {+ (add),x (multiply),- (subtract),/ (divide),% (remainder)}")
                    .setColor(0xFF0000)
                    .setFooter("Requested by " + message.author.username, message.author.avatarURL);
                message.channel.send(embed);
                }
                break;