141 − 27 + 27 − 59 = 141 + (−27 + 27) − 59 = 141 + 0 − 59 = 141 − 59 = 82
32 × 168 − 68 × 32 = (168 − 68) × 32 = 100 × 32 = 3200
14 × 150 + 150 × 12 = 150 × (14 + 12) = 150 × 26 = 3900