(286+14):3+280 = 300:3+280 = 100+280 = 380
400-(64+36):10 = 400-100:10 = 400-10 = 390
240:3*5-399 = 80*5-399 = 400-399 = 1
300-100:25*30 = 300-4*30 = 300-120 = 180
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(286+14):3+280 = 300:3+280 = 100+280 = 380
400-(64+36):10 = 400-100:10 = 400-10 = 390
240:3*5-399 = 80*5-399 = 400-399 = 1
300-100:25*30 = 300-4*30 = 300-120 = 180