Answer :
Step-by-step explanation:
..................see picture....
55÷11[120÷2{4+(10+5-7)}]
5[60{4+(8)}]
5[60{4+8}]
5[60{12}]
5[60+12]
5[72]
5+72
77
so answer is 77

Step-by-step explanation:
..................see picture....
55÷11[120÷2{4+(10+5-7)}]
5[60{4+(8)}]
5[60{4+8}]
5[60{12}]
5[60+12]
5[72]
5+72
77
so answer is 77