how to increase skill damage?

[how to increase skill damage?]

i need to increase all Hunter trap...
i try this but not work.

#ifdef RENEWAL
    case HT_LANDMINE:
    case MA_LANDMINE:
    case HT_BLASTMINE:
    case HT_CLAYMORETRAP:
        md.damage = skill_lv * sstatus->dex * (3+status->getlv(src)/10) * (1+sstatus->int/35);
        md.damage += md.damage * (rnd()%90-100) / 10;
        md.damage += 40 * (sd?pc->checkskill(sd,RA_RESEARCHTRAP):0);
        break;
#else
    case HT_LANDMINE:
    case MA_LANDMINE:
        md.damage=skilllv(sstatus->dex+7500)(100+sstatus->int)/10;
        break;
    case HT_BLASTMINE:
        md.damage=skilllv(sstatus->dex/2+5000)(100+sstatus->int)/10;
        break;
    case HT_CLAYMORETRAP:
        md.damage=skilllv(sstatus->dex/2+7500)(100+sstatus->int)/10;
        break;
#endif