1) 234-(20:5+3)+152= 24 - (4 + 3) + 152= 24 - 7 + 152= 169
2) 607-6*6:(13-4)+48:8= 607 - 36:(13-4) + 6= 607 - 36:9 + 6= 607 - 4 + 6= 609
3) 54:(21-15)8-63:7-(134-128)= 54:68 - 63:7 - 6= 54:68 - 9 - 6= 98 - 9 - 6= 72 - 9 - 6= 57
1) 234-(20:5+3)+152
= 24 - (4 + 3) + 152
= 24 - 7 + 152
= 169
2) 607-6*6:(13-4)+48:8
= 607 - 36:(13-4) + 6
= 607 - 36:9 + 6
= 607 - 4 + 6
= 609
3) 54:(21-15)8-63:7-(134-128)
= 54:68 - 63:7 - 6
= 54:68 - 9 - 6
= 98 - 9 - 6
= 72 - 9 - 6
= 57