(600-45×4)×9-163×(3+5)=
(600-180)×9-163×8=
420×9-1 304=
3 780-1 304=
2 476
[3×(900-175×4)+25]×6=
[3×(900-700)+25]×6=
(3×200+25)×6=
(600+25)×6=
625×6=
3 750
[65×(900-875)-1248]×4-42×21=
(65×25-1248)×4-882=
(1625-1248)×4-882=
377×4-882=
1 508 - 882 =
626