Question

1) 10+[4+(7.3+1)]-3
2) 70={20-2.[3-(5-a]}
3)50.{10-2[(6+4:2)-(10-})]}

Answer 1

1)10+[4+(7.3+1)]-3
10+[4+(21+1)]-3
10+(4=22)-3
10+26-3
36-3
=33