4). 2x[(891-628)x5+4x(1360-142)]=2x263x5+4x1218= 2630+4872=7502
[(100+125):15+476:(282-265)]x3= (225:15+476:17)x3=(15+28)x3=43x3=129
6). 214*2+325-2*[(214+2*325)-(214+325)]:5= 428+325-2*(864-539):5=
753-2*325:5=753-650:5=688
325+2*214+2*[(325-214)*2-214]=325+428+2*(111*2-214)=325+428+2*8=753+18=771
sper sa fie bine.