Fixed

#include <a_samp>

#define RED 0xFF000000
#define red 0xFF000000
#define COLOR_WHITE 0xFFFFFFAA
#pragma tabsize 0

new bool:mathson,stopper,answer;

forward endmath();

#define dcmd(%1,%2,%3) if ((strcmp((%3)[1], #%1, true, (%2)) == 0) && ((((%3)[(%2) + 1] == 0) && (dcmd_%1(playerid, "")))||(((%3)[(%2) + 1] == 32) && (dcmd_%1(playerid, (%3)[(%2) + 2]))))) return 1

public OnFilterScriptInit()
{
        print("\n--------------------------------------");
        print("Maths System");
        print("--------------------------------------\n");
        return 1;
}

public endmath()
{
        new string[128];
        format(string,200,"MATHS: The answer was: %d!",answer);
        SendClientMessageToAll(COLOR_WHITE,string);
    mathson=false;
        return 1;
}

stock startmath()
{
        if(mathson) return 1;
                new rand1;
                new rand2;
                new rand3;
                new rand4;
                rand1 = random(222);
                rand2 = random(111);
                rand4 = random(50);
                rand3 = random(2);
                if(rand3 == 0)
                {
                        answer = rand1 + rand2 + rand4;
                        new str[200];
                        format(str,200,"MATHS: Answer %d+%d+%d to win $1000 and 5 points! Use /answer [answer]",rand1,rand2,rand4);
                        SendClientMessageToAll(COLOR_WHITE,str);
                }
                else if(rand3 == 1)
                {
                        answer = rand1 + rand2 - rand4;
                        new str[200];
                        format(str,200,"MATHS: Answer %d+%d-%d to win $1000 and 5 points! Use /answer [answer]",rand1,rand2,rand4);
                       SendClientMessageToAll(COLOR_WHITE,str);
                }
                stopper = SetTimer("endmaths",100*1000,0);
        }
        return 1;
}

public OnPlayerCommandText(playerid, cmdtext[])
{
        dcmd(ans,3,cmdtext);
        dcmd(domath,6,cmdtext);
        return 0;
}
dcmd_domath(playerid,params[])
{
        if(IsPlayerAdmin(playerid))
        {
                #pragma unused params
                startmath();
        mathson=true;
        return 1;
        }
        return 0;
}
dcmd_ans(playerid,params[])
{
        if(mathson == true)
        {
            if(!strlen(params)) return SendClientMessage(playerid,red,"Usage: /Answer [Your Answer]");
            new tehans;
            tehans = strval(params);
            if(tehans == answer)
            {
                new name[16];
                GetPlayerName(playerid,name,16);
                new str[128];
                format(str,128,"MATHS: %s has won with the answer %d!",name,answer);
                SendClientMessageToAll(COLOR_WHITE,str);
                mathson = false;
                KillTimer(stopper);
                GivePlayerMoney(playerid,1000);
                SetPlayerScore(playerid, GetPlayerScore(playerid) + 5 );
             }
             else
        {
            SendClientMessage(playerid,RED,"Wrong answer!");
            SetPlayerScore(playerid, GetPlayerScore(playerid) - 5 );
             }
        }
        else
        {
            return SendClientMessage(playerid,RED,"Maths challenge is not active!");
        }
        return 1;
}