800•50-(3159+29099)+(200000-70097)=137645
800•50=40000
3159+29099=32258
200000-70097=129903
40000-32258+129903=137645
800•50-(3159+29099)+(200000-70097)=137645
800•50=40000
3159+29099=32258
200000-70097=129903
40000-32258+129903=137645