1) (704-349)+...= 634
355+...= 634
634-355= 279
> (704-349)+279=634
2) ...-(425-164)=525
...-261=525
525+261= 786
> 786-(425-164)=525
3) (800:100)•...=592
8•..=592
592:8= 74
>(800:100)•74=592
4) ... :(14•5)= 19
... :70= 19
70•19= 1330
> 1330:(14•5)=19