5*(24:3-7)+42:(21:3)*9=
1) 24:3 = 8
2) 8-7 = 1
3) 21:3 = 7
4) 5*1=5
5) 42:7 = 6
6) 6*9 = 54
7) 5+54 = 59.
5*(24:3-7)+42:(21:3)*9=
1) 24:3 = 8
2) 8-7 = 1
3) 21:3 = 7
4) 5*1=5
5) 42:7 = 6
6) 6*9 = 54
7) 5+54 = 59.