603 × (1812 ÷ 2) × 30 – (790 × 97 – 92142 ÷ 6)

1) 1812 : 2 = 906
2) 603 * 906 * 30 = 16389540
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3) 790 * 97 = 76630
4) 92142 : 6 = 15357
5) 76630 - 15357 = 61273
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6) 16389540 - 61273 = 16328267  ответ