(-4)*20-(-4)*15-(-4)*62+(-4)*97
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-4 × 20 - (-4) × 15 -(-4) × 62 + (-4) ×97
-80 - (-60) - (-248) - 388
-80 + 60 + 248 - 388
60 + 248 - 388 - 80
308 - 468
= -160.
Hope it helps.
-80 - (-60) - (-248) - 388
-80 + 60 + 248 - 388
60 + 248 - 388 - 80
308 - 468
= -160.
Hope it helps.
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