IF Formula Closing Bracket is a issue for me

=round(if(((today()-e3)/365)<60,if(bb3<=250000,0,if(bb3<=500000,((bb3-250000)*5%),if(bb3<=750000,((bb3-500000)*10%+12500),if(bb3<=1000000,((bb3-750000)*20%+37500),if(bb3<=1250000,((bb3-1000000)*25%+75000),if(bb3<=1500000,((bb3-1250000)*30%+125000),((bb3-1500000)*30%+187500)))))),0),if(((today()-e3)/365)>80,if(bb3<=500000,0,if(bb3<=750000,((bb3-500000)*10%),if(bb3<=1000000,((bb3-750000)*15%+25000),if(bb3<=1250000,((bb3-1000000)*20%+62500),if(bb3<=1500000,((bb3-1250000)*25%+112500),((bb3-1500000)*30%)+175000)),if(bb3<=300000,0,if(bb3<=500000,((bb3-300000)*5%),if(bb3<=750000,((bb3-500000)*10%+10000),if(bb3<=1000000,((bb3-750000)*15%+35000),if(bb3<=1250000,((bb3-1000000)*20%+72500),if(bb3<=1500000,((bb3-1250000)*25%+122500),((bb3-1500000)*30%+185000))))),0)