1) 463 - (283 + 121) = 463 - 283 - 121 = 180 - 121 = 59
2*5*(3*6 - 16 + 1) = 10*(36 - 16 + 1) = 10*21 = 210
59 < 210
2) (823 + 102) - (321 + 271) = 925 - 592 = 333
(31 - 29)*(76 - 67) + 34 = 2*9 + 34 = 18 + 34 = 52
333 > 52
3) (850 - 841)*(723 - 715) = 9*8 = 72
[(100 - 25) - (85 - 15)]*5 = [75 - 70]*5 = 5*5 = 25
72 > 25