6,93:(0,028+0,36*4,2)-3,5
6,93:(0,028+0,36*4,2)-3,5=1
1. 0,36*4,2=1,512
2. 0,028+1,512=1,54
3. 6,93:1,54=4,5
4. 4,5-3,5=1